Smartphone cameras have become astonishingly capable, but their progress has produced one unmistakable design compromise: the camera bump. Larger sensors, brighter apertures, longer focal lengths, image stabilization hardware and multiple optical elements all need physical space. As phone bodies remain thin, the camera module increasingly rises above the rear panel.
Metalenses and metasurface optics attack the problem from a different direction. Instead of asking engineers to squeeze another stack of curved plastic or glass elements into a few millimetres, a metalens controls light with patterns of nanostructures fabricated on an extremely thin surface. In principle, those structures can focus, steer and manipulate light while occupying far less depth than a conventional lens system.
Recent peer-reviewed results make the idea more than futuristic speculation. A 2024 Science Advances study demonstrated a folded metasurface imaging system only 0.7 mm thick. In 2025, Samsung Research and POSTECH reported a compact metalens-based infrared eye camera with a 120-degree field of view and 1.758 mm total optical track length. Both experiments are scientifically important, but neither is a drop-in replacement for the full-color main camera in a current flagship phone.
The real story is therefore more interesting than “camera bumps are about to disappear.” This article looks at how flat optics works, what researchers have actually demonstrated, why color photography remains difficult, how AI may compensate for optical limitations, and which parts of a smartphone could adopt metalenses first.
Table of Contents
Why Smartphone Cameras Have a Bump What Is a Metalens? Metalens vs Conventional Smartphone Lens How Nanostructures Control Light Why Phones Need Multiple Lens Elements The 2024 0.7 mm Folded-Metasurface Experiment Samsung and POSTECH’s 2025 Metalens Research How AI and Computational Photography Could Help The Chromatic Aberration Problem Aperture, Efficiency and Image Quality Can Metalenses Work With Large Phone Sensors? Manufacturing Metalenses at Scale Are Metalenses Already in Consumer Devices? Could Metalenses Replace Periscope Cameras? Will Metalenses Actually Remove the Camera Bump? When Could Metalens Smartphones Arrive? FAQMetalens Smartphone Cameras in 30 Seconds
These figures describe specific research prototypes. They should not be interpreted as specifications for a future iPhone, Galaxy or Pixel camera. The most important scientific distinction is that the highlighted prototypes operated in infrared or narrow wavelength conditions rather than replacing a broadband visible-light flagship camera.
Why Smartphone Cameras Have a Bump
The camera bump exists because optics cannot be miniaturized in the same way as a transistor. A phone processor can gain enormous capability while individual transistor features shrink to nanometre dimensions, but a camera still has to collect real photons from a scene and guide them onto an image sensor. The amount of light, the angle at which it arrives and the distance over which it can be focused all impose physical constraints.
A modern smartphone main camera normally contains several shaped lens elements positioned above a CMOS image sensor. Those elements are not redundant. Their surfaces and spacing help focus the scene while correcting different classes of optical error. At the same time, manufacturers have moved toward larger camera sensors because more sensor area can collect more light. A larger sensor can improve low-light performance, dynamic range and the ability to produce a shallow depth-of-field effect, but it generally requires a larger optical system.
Aperture matters too. A wide aperture admits more light, which is particularly valuable at night, but the physical entrance pupil cannot become arbitrarily small if the camera is expected to remain bright. Optical image stabilization also needs room for the lens group or sensor to move. Add autofocus actuators, filters, protective glass and mechanical packaging, and the module becomes much deeper than the phone designer would like.
Telephoto modules make the conflict even more obvious. To provide long optical zoom without making the phone several centimetres thick, manufacturers use folded or periscope optics. A prism turns incoming light through roughly 90 degrees so the lens train can run horizontally across the phone. That is an ingenious workaround, but it still consumes substantial internal volume.
In short, the bump is a symptom of a deeper conflict: camera engineers benefit from optical path length, while industrial designers want a thinner device. Metalenses are interesting because they offer a new way to engineer that optical path instead of merely compressing conventional lenses more aggressively.
What Is a Metalens?
A metalens is a thin optical element that uses a patterned array of structures smaller than the wavelength of light to manipulate an incoming wavefront. The word does not mean the lens must literally be made of metal. Modern metalenses may use dielectric materials chosen for high optical efficiency and compatibility with nanofabrication.
The broader concept is a metasurface: a two-dimensional or quasi-two-dimensional arrangement of engineered nano-scale features that can control properties of light such as phase, amplitude, polarization and propagation direction. A focusing metasurface becomes a metalens when its pattern produces the phase delays required to bring incoming light toward a focus.
A conventional refractive lens achieves focusing mainly through its curvature and refractive index. Light traveling through different regions experiences different optical path lengths. The curved surface therefore reshapes the wavefront. A metalens produces a comparable phase profile through local interactions with tiny structures distributed across a mostly flat surface.
This difference matters because the optical function is encoded into the surface pattern rather than requiring a thick curved body. The patterned layer itself may be extremely thin. That opens the possibility of optical modules with far lower vertical depth, or modules that perform focusing and another function at the same time.
It is important, however, not to confuse an ultra-thin optical surface with an entire ultra-thin camera. A complete camera still needs a sensor, substrate, aperture, packaging, electrical connections and a finite distance between the focusing element and the sensor. What changes is the range of functions that can potentially be achieved inside that limited space.
Metalens vs Conventional Smartphone Lens
| Feature | Conventional Smartphone Lens | Metalens / Metasurface Optics |
|---|---|---|
| How light is controlled | Curved refractive surfaces and multiple optical elements | Nanoscale structures create a designed phase response |
| Physical profile | Requires lens thickness plus spacing between elements | Functional optical surface can be extremely thin |
| Broadband color imaging | Highly mature | Improving, but still challenging |
| Manufacturing ecosystem | Mass-produced at enormous scale | Wafer-scale and nanoimprint routes are developing |
| Potential multifunctionality | Usually distributed across separate optical elements | One patterned surface can potentially focus, steer or filter light |
| Near-term phone use | Mainstream in every camera | Most plausible first in sensing, biometrics, depth and hybrid modules |
The most important point in this comparison is maturity. Conventional smartphone optics are not primitive. They are the result of decades of optical engineering, moulding technology, coatings, actuator design and high-volume assembly. Metalenses therefore do not merely have to be thinner. They must eventually produce enough real-world value to justify replacing an ecosystem that already works remarkably well.
How Nanostructures Bend and Control Light
Describing a metalens as a “flat lens” is useful for consumers, but it can hide the physics that makes the technology powerful. Light is an electromagnetic wave. To focus a wave onto a point, an optical device needs to impose the right phase delay at each position across its aperture so that the outgoing wave converges constructively at the desired focus.
In a metalens, each nanoscale feature acts as a tiny optical scatterer or resonator. Changing its diameter, height, orientation, aspect ratio or surrounding material changes how light passing through or reflecting from that feature behaves. By placing millions or billions of these structures according to a calculated map, researchers can construct the spatial phase response needed for a lens.
This is why metasurfaces are broader than ordinary lenses. A carefully designed surface can also steer beams, split polarization states, generate structured light or modify spectral response. A future smartphone could therefore use metasurface components not only for its primary camera but for face authentication, proximity sensing, depth mapping, eye tracking, LiDAR-like functions or compact augmented-reality optics.
Why Phones Need Multiple Lens Elements Today
A single ideal thin lens is easy to draw in a physics textbook. A real smartphone camera is far less forgiving. Light arrives from many angles and contains a broad range of wavelengths. The lens must create a sharp image across millions of pixels, from the centre of the frame to its edges, in daylight and in dim scenes.
Optical aberrations make that difficult. Spherical aberration occurs because rays passing through different regions of a spherical surface may not meet at exactly the same focus. Coma can distort off-axis points into comet-like shapes. Astigmatism and field curvature affect focus across the image plane. Distortion changes geometry, while chromatic aberration appears because optical behavior varies with wavelength.
Designers use multiple lens elements because each element adds another degree of freedom. The curvature, refractive index, spacing and aspheric profile of one element can compensate for errors introduced elsewhere. Smartphone lens stacks are highly optimized systems, often using moulded plastic aspherical elements to keep size and cost under control.
That explains why replacing “a lens” is not the right benchmark for a metalens. A successful mobile meta-optical system must reproduce enough of the functionality of an entire corrected optical stack. It must also do so over a useful aperture and field of view, and ideally across the visible spectrum.
The 2024 0.7 mm Folded-Metasurface Experiment
A particularly relevant demonstration appeared in Science Advances in 2024 under the title Metasurface folded lens system for ultrathin cameras. Rather than using a single flat focusing element, the researchers built a folded optical system in which multiple metasurfaces redirected and focused light inside a thin transparent substrate.
The idea resembles the logic behind a smartphone periscope camera: if there is not enough vertical space, make the light travel sideways. But metasurfaces allow the redirection and focusing functions to be integrated into patterned optical surfaces rather than relying only on a conventional prism plus a long refractive lens train.
What the 2024 prototype reported
- System thickness: 0.7 mm
- Effective focal length: 1.4 mm
- Field of view: approximately 10 degrees
- Aperture: f/4
- Operating wavelength: 852 nm
- Imaging goal: ultrathin folded imaging with near-diffraction-limited performance in its designed conditions
Primary source: Science Advances, DOI 10.1126/sciadv.adr2319.
The headline number is the 0.7 mm thickness. The system had an effective focal length of 1.4 mm, meaning the folded arrangement compressed the vertical thickness to about half the effective focal length. That is exactly the type of space-saving strategy mobile hardware engineers care about.
But the wavelength is just as important as the thickness. 852 nm is near-infrared. A normal smartphone main camera must handle a broad visible spectrum from roughly violet through red and reproduce colors accurately. A system optimized around a near-infrared wavelength faces a substantially easier chromatic problem.
The relatively narrow field of view and f/4 aperture also show why laboratory success should not be translated directly into “0.7 mm flagship camera.” The research proves a powerful optical architecture. It does not yet reproduce the complete capability of a modern wide-angle phone camera.
Samsung and POSTECH’s 2025 Metalens Research
In 2025, researchers associated with Samsung Research and POSTECH published another important metalens result in Nature Communications. Their target was not a conventional rear smartphone camera. Instead, the team demonstrated a compact infrared eye camera relevant to gaze tracking and biometric imaging.
That difference is important because it tells us where metalenses may enter consumer electronics first. Eye tracking, depth sensing and authentication systems can operate at controlled infrared wavelengths. They do not have to capture a natural-looking broadband color photograph. That reduces one of the hardest challenges facing a main camera metalens.
What the Samsung Research / POSTECH system demonstrated
- Field of view: 120 degrees
- Total optical track length: 1.758 mm
- Application: compact infrared eye imaging
- Design focus: reduce the nanostructure aspect-ratio burden and improve practical manufacturability
Primary source: Nature Communications, DOI 10.1038/s41467-025-62577-1.
One of the less glamorous but most important parts of the work is manufacturability. A theoretically beautiful metasurface can still fail commercially if its nano-pillars are too tall, too narrow or too sensitive to fabrication errors. High aspect-ratio structures become difficult to pattern and etch reliably. Lowering those requirements can improve yield and make wafer-scale production more plausible.
This is a recurring theme in emerging optics: the best laboratory lens is not necessarily the best product lens. A mass-market phone component has to survive millions of manufacturing cycles, thermal changes, mechanical shocks, packaging constraints and cost pressure while maintaining predictable optical performance.
How AI and Computational Photography Could Help Metalenses
The smartphone industry has already learned that image quality does not come from optics alone. Modern phones rely on computational photography and HDR techniques to merge exposures, reduce noise, recover highlight detail, estimate depth and sharpen images. That makes smartphones an unusually attractive platform for computational meta-optics.
A metalens system does not necessarily have to produce a perfectly corrected image directly on the sensor. If the imperfections are stable and mathematically predictable, software can be designed together with the optics. The optical hardware captures an encoded or partially degraded image, and a reconstruction algorithm restores detail, color or contrast.
This concept becomes even more practical as phones gain dedicated AI hardware such as NPUs. Specser’s guide to NPUs in smartphones explains how neural-processing hardware accelerates machine-learning workloads locally, while on-device AI reduces the need to send every computational task to the cloud.
Researchers have already explored neural-network reconstruction for metalens camera systems. The broader lesson is that future camera design may become a co-optimization problem: engineers choose an optical response that is compact and manufacturable, then train or design software to compensate for known shortcomings.
This is not a free solution. Computational correction can amplify noise, create artifacts or fail when the scene differs from the training distribution. A neural network also cannot recover photons the camera never collected. Poor optical efficiency remains poor optical efficiency. Nevertheless, computation can reduce the need for every aberration to be solved with physical glass.
The Chromatic Aberration Problem
If one issue separates impressive metalens demonstrations from a universal smartphone-camera replacement, it is broadband color performance. White light contains many wavelengths. A normal photograph depends on the camera handling those wavelengths consistently enough that red, green and blue information forms a sharp image at the sensor.
Metasurface structures are strongly dispersive: their phase response changes with wavelength. A pattern optimized to focus one color may focus another wavelength at a different distance or with a different wavefront error. The result can be blur, colored edges and loss of resolution.
Researchers are working on achromatic metalenses, which attempt to control both phase and dispersion across multiple wavelengths. Approaches include engineered resonances, multiple coupled structures, cascaded surfaces, inverse design and hybrid conventional/meta-optical systems.
But there is a trade-off. Expanding bandwidth can reduce efficiency or demand more complex nanostructures. Increasing numerical aperture or field of view adds further design pressure. A system may perform extremely well on one metric while becoming harder to manufacture or less efficient on another.
Aperture, Efficiency and Image Quality: Why Thin Is Not Enough
Phone buyers do not care how elegant the nanostructures are if the resulting photographs are noisy or soft. For metalenses to transform mobile photography, several performance requirements must be met simultaneously.
Aperture
A wide effective aperture helps collect enough photons for night photography, fast shutter speeds and usable telephoto performance.
Photon Throughput
Reflection, scattering, absorption and unwanted diffraction can send light away from the desired focus. Lost photons directly affect signal-to-noise ratio.
Field of View
A phone camera must stay sharp far from the optical axis. Wide-angle performance is much harder than making a tiny central image look good.
Fabrication Tolerance
Nanoscale dimensional errors can change optical response, meaning manufacturing repeatability is central to commercial viability.
Broadband Correction
A practical main camera must handle a broad visible spectrum without severe wavelength-dependent focus errors.
Large Aperture Area
As the usable lens area grows, the number of nanostructures and the demand for consistent patterning also rise.
These constraints are interconnected. Making the aperture larger can make aberration correction harder. Increasing bandwidth can reduce efficiency. Making nanostructures more complex can reduce manufacturing yield. The engineering challenge is therefore multi-objective optimization rather than a race toward the thinnest possible lens.
Can Metalenses Work With Large Smartphone Camera Sensors?
Larger smartphone camera sensors are appealing because they can collect more light, but they create a tougher optical problem. The lens must illuminate a larger image circle while maintaining acceptable sharpness and chief-ray angles across the sensor. A tiny experimental sensor can therefore make an optical system look more compact than a phone-scale equivalent.
This is one reason the first important metalens applications in phones may involve small sensors used for biometrics, depth estimation or machine vision. Those components can benefit enormously from reduced thickness without requiring the same image circle, broadband color accuracy and photographic dynamic range as the primary rear camera.
Hybrid optics may offer a bridge. Instead of replacing every conventional element, a manufacturer could add one metasurface to a refractive stack. That surface might correct a specific aberration, steer light, reduce the number of conventional elements or perform a filtering function. Even a modest reduction in lens count could save valuable vertical space.
For consumers, this means the first “metalens smartphone camera” may not look revolutionary from the outside. Meta-optics could quietly appear inside an autofocus, depth, face-authentication or hybrid camera module before a manufacturer markets an entirely flat main-camera system.
Manufacturing Metalenses on Semiconductor-Style Wafers
The commercial promise of flat optics depends heavily on manufacturing. Conventional camera lenses are produced using extremely mature moulding, coating and assembly processes. A metalens instead relies on nano-patterning methods that resemble semiconductor fabrication.
Candidate techniques include deep-ultraviolet photolithography, electron-beam lithography for research and mask preparation, and nanoimprint lithography for replicating patterns over larger areas. The goal is to create millions of optical elements on a wafer and then package them using processes compatible with high-volume electronics manufacturing.
The Roadmap for Optical Metasurfaces published in ACS Photonics describes commercialization as a staged process. Simpler narrowband components are easier to manufacture than highly corrected broadband visible metalenses. Scaling to larger apertures, smaller critical dimensions and high-aspect-ratio structures increases cost and fabrication difficulty.
Yield is critical. A phone manufacturer cannot tolerate a production method in which a large percentage of lenses miss their intended optical response. It also cannot afford time-consuming per-device alignment or characterization. Commercial success will require the optical design to be robust against normal process variation.
This helps explain why research that reduces aspect ratio or simplifies the required phase response can matter as much as a new resolution record. A slightly less exotic metalens that can be manufactured on standard wafers at high yield may have more commercial impact than an extremely high-performance device requiring bespoke fabrication.
Further reading: Roadmap for Optical Metasurfaces, ACS Photonics.
Are Metalenses Already in Consumer Devices?
Yes, in selected forms. But the phrase needs qualification. Metasurface optics have reached commercial products primarily where the spectral requirements are controlled and the device performs a specific optical function. Near- infrared sensing is particularly attractive because the system can be optimized around a narrow wavelength band.
This makes applications such as face authentication, depth sensing and eye tracking natural early markets. A compact infrared component can save physical space without needing to create a natural-color photograph across the visible spectrum.
Commercial demonstrations are also becoming more ambitious. Companies working on meta-optics have shown wafer-scale components, compact camera modules and prototype consumer devices. These demonstrations matter because they test whether metasurface designs can survive packaging and manufacturing outside a university experiment.
Still, “commercial metalens” and “main smartphone camera replacement” should not be treated as synonyms. The latter is much harder. Main cameras are judged on detail, color science, flare, low-light performance, autofocus, stabilization, video quality and consistency across millions of devices.
Could Metalenses Replace Periscope Cameras?
Periscope cameras are one of the most obvious places to consider folded meta-optics because both technologies try to fit a long optical path into a thin device. Conventional periscope camera modules typically use a prism or mirror to turn incoming light sideways and then pass it through a telephoto lens train.
A metasurface could potentially combine beam steering and focusing in a thinner package. Multiple metasurfaces could also fold the optical path through a substrate, reducing the number of conventional parts. In principle, this could make high-magnification modules thinner or free internal space for a larger battery. Phones such as the Samsung Galaxy S22 Ultra show how much hardware a multi-camera system with optical zoom must currently package inside the chassis.
Yet telephoto photography is an unforgiving application. A long focal length with a small aperture collects little light, which is why phone telephoto cameras often struggle at night. Any metalens used in such a system must therefore be highly efficient. Saving one millimetre is not useful if too many photons are lost to unwanted diffraction.
The near-term winner may again be hybrid optics: a conventional folded telephoto design assisted by one or more metasurfaces rather than a completely refractive-free periscope camera.
Will Metalenses Actually Remove the Smartphone Camera Bump?
They could reduce it, but complete elimination is not guaranteed. That is the scientifically defensible answer today.
Recent research proves that metasurfaces can dramatically reshape how an optical path is packaged. The 2024 folded system demonstrates that meaningful focal length can be packed into very little vertical thickness. The 2025 Samsung Research/POSTECH work demonstrates a compact wide-field infrared camera while explicitly engaging with manufacturability constraints.
The remaining obstacle is integration of all the requirements expected from a flagship main camera: broadband visible operation, high numerical aperture, wide field of view, high efficiency, low flare, high resolution, fast autofocus, stabilization compatibility and extremely low per-unit cost.
There is also a more subtle reason camera bumps may survive. When technology gives manufacturers more internal space, they often spend that space on better hardware rather than making the device smaller. A meta-optical system that saves two millimetres might be paired with a larger sensor, a brighter aperture or a more ambitious zoom system.
In that scenario, metalenses would still be transformative even if the back of the phone were not completely flat. The benefit would appear as more camera capability per cubic millimetre.
When Could Metalens Smartphones Arrive?
Exact dates should be treated skeptically because commercial adoption depends on engineering economics, not only on scientific progress. Some meta-optical functions are already commercially practical. More advanced broadband imaging is still moving through research and early commercialization.
The most plausible adoption path is gradual. First, meta-optics appear in narrowband infrared sensors. Next, they may enter depth, authentication, eye-tracking or autofocus modules. Hybrid visible-light camera systems could follow, combining conventional refractive optics with metasurfaces. A more complete main-camera replacement would require stronger broadband performance and proven high-volume manufacturing.
For that reason, the second half of the 2020s is a useful period to watch, but there is no defensible universal date for “the first real metalens phone.” Product schedules can also change rapidly because camera suppliers and smartphone manufacturers test many technologies that never ship at scale.
The broader trend is easier to predict than the exact year: like other future smartphone technologies, smartphone cameras are becoming systems in which optical hardware, sensors and computation are designed together. Metalenses fit naturally into that direction.
What Would a Real Metalens Smartphone Need to Prove?
| Requirement | Why It Matters | What Would Count as Convincing Progress? |
|---|---|---|
| Broadband visible color | Normal photography uses a large portion of the visible spectrum. | Sharp RGB imaging with low chromatic error across real scenes. |
| Wide aperture | Phones need strong photon collection for night and video. | High efficiency at a commercially useful f-number. |
| Large field of view | Main cameras must be sharp from center to corners. | High MTF and controlled aberrations across a phone-scale field. |
| Sensor compatibility | Flagship sensors are larger than many research demonstrators. | Performance maintained across a commercially relevant image circle. |
| Wafer-scale yield | Phones ship in huge volumes. | Repeatable fabrication with low defect rates and acceptable cost. |
| Environmental durability | Phones experience heat, drops and years of use. | Stable optical behavior after packaging and reliability testing. |
| Computational robustness | Software correction must work across arbitrary scenes. | Consistent reconstruction without severe hallucination or artifacts. |
Related Reading on Specser
Metalenses sit at the intersection of smartphone optics, AI processing and next-generation device design. These Specser guides provide useful background:
Scientific Sources and Further Reading
- Kim et al. (2024), Science Advances. “Metasurface folded lens system for ultrathin cameras.” DOI: 10.1126/sciadv.adr2319
- Yun et al. (2025), Nature Communications. “Compact eye camera with two-third wavelength phase-delay metalens.” DOI: 10.1038/s41467-025-62577-1
- Roadmap for Optical Metasurfaces, ACS Photonics. Overview of design, applications, fabrication and commercialization challenges. DOI: 10.1021/acsphotonics.3c00457
Editorial note: research prototypes should be compared using their actual operating wavelength, field of view, aperture, sensor configuration and manufacturing method. Narrowband infrared results are highly relevant to compact optics but should not be presented as equivalent to a finished broadband visible-light flagship camera.
Optional AI Image Prompts for Extra Article Images
The SVG diagrams above are already embedded and can be used immediately. If you later want photorealistic artwork, insert these images in addition to the SVGs rather than replacing the scientific diagrams.
1. Hero Smartphone Image
Place: below the opening hero box and above the first SVG, or use as the featured image.
Prompt: Ultra-premium smartphone side profile split comparison, left side thick multi-lens camera bump with visible stacked optics, right side futuristic nearly flat camera using transparent nanostructured metalens surface, realistic product engineering render, subtle blue and violet light, dark studio background, scientifically plausible, no brand logo, no text, 16:9.
2. Metalens Nanostructure Macro
Place: inside “How Nanostructures Bend and Control Light.”
Prompt: Scientific macro visualization of a dielectric metalens surface covered with millions of nanoscale pillars of varying dimensions, visible light wavefront changing phase across the surface and converging toward one focal point, clean photonics research aesthetic, dark navy background, no text, 16:9.
3. Future Wafer Manufacturing Image
Place: inside “Manufacturing Metalenses on Semiconductor-Style Wafers.”
Prompt: Photorealistic semiconductor fabrication scene showing a large glass wafer containing hundreds of tiny flat optical metalens components, robotic wafer handling, cleanroom environment, close-up inset feeling of nanoscale patterns, realistic advanced photonics manufacturing, no company logos, no text, 16:9.
FAQ: Metalens Smartphone Cameras
What is a metalens?
A metalens is a thin optical element patterned with structures smaller than the wavelength of light. Those structures alter the phase and other properties of the incoming optical wavefront, allowing the surface to perform focusing and other optical functions normally associated with thicker conventional components.
Can metalenses remove smartphone camera bumps?
They may substantially reduce camera-module thickness, especially when combined with folded optical paths or hybrid designs. However, current research has not yet demonstrated a universally superior, full-color flagship main camera that is thin enough and cheap enough to prove camera bumps will disappear completely.
How thin has a metasurface camera become in research?
A 2024 Science Advances experiment reported a folded metasurface lens system with a thickness of 0.7 mm and an effective focal length of 1.4 mm. It operated at 852 nm with a roughly 10-degree field of view and f/4 aperture, making it an important ultrathin-optics demonstration rather than a finished smartphone main camera.
Is Samsung researching metalens cameras?
Yes. Samsung Research and POSTECH researchers published a 2025 Nature Communications paper on a compact infrared eye camera using a metalens. The reported system had a 120-degree field of view and a 1.758 mm total optical track length. It was designed for compact eye imaging, not as a commercial Galaxy rear camera.
Why are metalenses difficult to use for normal color photography?
Their optical response varies with wavelength. A design that focuses one wavelength very well may focus another at a different distance, causing chromatic aberration. Correcting a broad visible spectrum while also maintaining wide aperture, efficiency and field of view is much harder than operating at one narrow infrared wavelength.
Can AI fix metalens image quality?
AI and computational imaging can correct some predictable blur, color error and distortion, particularly when the optical hardware and reconstruction algorithm are designed together. But software cannot recover photons that were never captured, so strong optical efficiency and a useful aperture are still essential.
Are metalenses already commercial?
Metasurface optics have entered selected commercial sensing and optical applications, especially where operation is restricted to a narrow wavelength band. Replacing the broadband visible-light main camera in a flagship smartphone is a significantly more demanding target.
Could a metalens replace a periscope zoom camera?
Folded meta-optics could potentially reduce the size of telephoto modules or combine beam-steering and focusing functions. In the near term, hybrid systems that combine metasurfaces with conventional prisms and refractive lenses may be more practical than eliminating all conventional elements.
Will a metalens make phones thinner?
Possibly, but manufacturers may also use any saved space for larger sensors, better stabilization, brighter optics, more zoom capability or larger batteries. The commercial benefit may therefore appear as better camera performance at the same phone thickness rather than dramatically thinner phones.
When will metalens smartphones arrive?
There is no reliable single date. Narrowband meta-optical components are already practical in some products, while broadband visible smartphone imaging remains an active research and commercialization challenge. Hybrid and sensing applications are likely to precede complete main-camera replacement.
Final Thoughts: The Camera Bump Is Really an Optics Problem
Metalenses are compelling because they attack the physical reason camera modules are thick. Instead of continually refining the same stack of curved elements, meta-optics gives engineers a different tool for controlling the optical wavefront and folding useful optical path length into extremely small spaces.
The science is real, but the limitations are equally real. A 0.7 mm near-infrared research camera and a compact 120-degree infrared eye camera are not evidence that the next flagship phone can replace its main camera with one flat sheet. Broadband color correction, aperture, efficiency, field of view, large-sensor compatibility and manufacturing yield all remain demanding engineering problems.
The most likely future is therefore not a sudden switch from glass lenses to metalenses. It is a gradual convergence: metasurfaces enter sensing modules, hybrid systems combine conventional and flat optics, and computational photography assumes a larger role in correcting what the physical optics cannot efficiently solve.
If that convergence succeeds, the biggest benefit may not be a perfectly flat phone. It may be something more useful: better cameras, larger sensors and longer zoom systems occupying far less space than today’s optics.
