Metalenz Polar ID Hides Face Unlock Under OLED Smartphone Screens

Metalenz on Monday unveiled Polar ID Under Display, a face authentication camera that reads polarized light through a fully powered-on smartphone OLED screen. The Boston-based startup demonstrated the system in the I-Zone at Display Week in Los Angeles on May 4, 2026, claiming a 0% spoof acceptance rate. The product is engineered for payment-grade unlock and targets consumer devices in 2028.

The launch matters because the Android side of the phone industry has tried for six years to hide the front camera beneath the screen and failed. Image quality drops. Diffraction artifacts smear faces. Light transmission through OLED panels collapses. Polar ID does not solve those problems by capturing a better picture. It sidesteps them by reading something cameras have never bothered to look at: the polarization of the light bouncing off skin.

That is the angle most coverage missed. This is not a better selfie camera hidden under the display. It is a sensor that does not care about traditional image quality at all.

How Polar ID Reads Light Differently Through The Display

Polar ID uses a single near-infrared illuminator at 940nm and a meta-optic camera the size of a U.S. penny, according to Metalenz’s Polar ID product brief. The metasurface is a flat array of nanostructures that sorts photons by polarization state. When 940nm light hits a real face, skin returns a distinctive polarization signature. Silicone, resin, paper, and 3D-printed masks return a different one.

OLED panels block roughly 70 to 80 percent of visible light. They block far less near-infrared. Crucially, they preserve polarization. That is why Polar ID survives under the screen while red-green-blue cameras still hallucinate. The sensor reads a physical property of the light, not the picture it forms.

The optical foundation comes from Federico Capasso’s metasurface lab at Harvard SEAS, where Metalenz holds an exclusive worldwide license. Capasso co-founded the company in 2017. Polar ID was demonstrated on a Snapdragon-powered reference platform, with the Samsung ISOCELL Vizion 931 image sensor sitting behind the metasurface as the light engine.

Why The 2028 Date Hides A Bigger Industry Reset

The under-display version arrives a year after the standard Polar ID module, which is locked for 2027 launch. Wired reported the staggered rollout means notches and punch-holes do not vanish overnight. Selfie cameras still need cutouts. What disappears first is the secure-unlock cutout, the slab of dead screen real estate Apple’s TrueDepth array has occupied since 2017.

That gap matters. Apple’s notch survived the iPhone X, X S, 11, 12, and 13. The Dynamic Island repackaged it on every iPhone since 2022. Android phones tried optical fingerprint readers, basic 2D face unlock, and ultrasonic in-display sensors. None of them passed bank-grade liveness tests at scale.

Polar ID claims to do that without a cutout at all. Rob Devlin, Metalenz’s CEO and co-founder, has framed the polarization approach in plain terms.

“Even if someone makes a perfect 3D scan of your face and puts it into the most jarringly lifelike silicone mask that you’ll ever see, Polar ID can still reject it. Other devices out there that are just using 2D, or even 3D, are able to be tricked by these masks. But Polar ID cannot.”

Devlin made those remarks on the ID Talk podcast in 2024, well before the Display Week reveal. The May 4 announcement is the first time the company has publicly demonstrated the same polarization trick surviving an active OLED stack.

Phone makers have a reason to push hard on this. Mobile payment volume in the U.S. crossed $1.4 trillion in 2025, and regulators in the EU and India now require liveness detection for any face-based payment authorization. A face unlock that fails a printed-mask test is a compliance problem. A face unlock with no visible camera is a marketing one nobody has solved.

Inside The UMC Deal That Made The Optic Manufacturable

The under-display piece is the headline. The reason it is shippable is a contract Metalenz signed in November 2025 with Taiwan’s United Microelectronics Corporation for Polar ID mass production. UMC is fabricating the meta-optic layer on its 40nm process node using 300mm wafer-on-wafer bonding. That is the same scale the company uses for its commercial CMOS image sensors.

The numbers below frame what this transition looks like compared with conventional 3D face unlock hardware.

Why Samsung’s Galaxy S27 Ultra Looks Like Launch Candidate Number One

Metalenz has not named a launch customer. It does not need to. The fingerprints are visible in the supply chain. Samsung’s ISOCELL Vizion 931 is the chosen sensor partner, with Metalenz’s 2024 confirmation of the Samsung Vizion 931 light engine noting 60% quantum efficiency at 850nm and 38% at 940nm. Firmware leaks from the Galaxy S27 Ultra build chain in early 2026 reference a polarization-based authentication module. Samsung pulled back from a generic under-display selfie camera roadmap last year. Polar ID gives it a different way back into the all-screen race.

For Samsung, this is also a Face ID counter at a moment when Apple has stalled its own under-display ambitions. Reports through 2025 said Apple shelved plans to bury TrueDepth under the iPhone display by 2027. The Dynamic Island, which Cupertino once described as a transitional design, now looks indefinite.

Devlin’s UMC partner has been just as direct on the manufacturing reality.

“This collaboration will enable UMC to expand our offering into sensor integrated metasurfaces and play a pioneering role in delivering this disruptive imaging technology to market,” said Steven Hsu, Vice President of Technology Development at UMC, in the November 2025 production announcement.

If a Galaxy S27 Ultra ships with Polar ID in early 2027, the under-display variant follows in a 2028 device. Samsung has the volume Metalenz needs. Metalenz has the only optic Samsung does not have to build itself.

The Spoofing Problem That Broke Earlier Under Display Attempts

ZTE’s Axon 20 5G shipped the first under-display selfie camera in 2020. Five generations and four years later, ZTE devices still produce visibly hazier images in the camera region. Xiaomi’s Mix 4 quietly fell off the roadmap. Samsung’s Galaxy Z Fold series stuck with a soft-edge under-display camera that owners commonly disable. Image quality is not the only failure. None of those cameras can authenticate a payment.

Liveness detection is the part that broke earlier attempts. A 2D camera can be fooled by a high-resolution photo. A standard structured-light projector can be fooled by a silicone mask molded from a 3D scan. Independent testing on consumer Android face unlock between 2022 and 2024 found print and replay attacks succeeding well above 5 percent of the time on most flagship devices, far above payment thresholds.

Polar ID’s polarization read is the bypass. Skin scatters polarized light in ways silicone, latex, and 3D-printed resins cannot reproduce, a property documented in Capasso group research on metasurface full-Stokes polarization cameras in Science. The single-frame nature of the read also matters. Replay attacks need motion. A static polarization signature taken in one capture cycle leaves no window.

What The Roadmap Still Leaves Unanswered

Polar ID can authenticate a face. It cannot, by itself, take a selfie. The selfie cutout question stays open until phone makers decide whether to keep a parallel under-display RGB camera or accept that a hole-punch front camera lives forever. Metalenz has hinted at a path with its February 2026 Polar 3D announcement at Mobile World Congress, which uses the same hardware to generate relightable 3D avatars from a single image. That is a digital identity play, not a vacation-photo replacement.

Pricing is also missing from the public picture. Metalenz says Polar ID lowers cost versus structured-light face unlock by collapsing the dot projector, flood illuminator, and IR camera into one optic and one light source. It has not shared a target bill of materials. Until a Galaxy device ships with the module priced into the BOM, the affordability claim runs on the company’s word.

Frequently Asked Questions

When Can I Buy A Phone With Polar ID?

The first phones using the standard above-display Polar ID module are scheduled for 2027, with the under-display version targeting 2028. Industry leaks point to a Samsung Galaxy flagship as the launch device, though Samsung has not confirmed. If the Galaxy S27 Ultra ships on its usual February cadence, expect the first commercial Polar ID consumer purchase window in early 2027.

Does Polar ID Work With Sunglasses Or A Face Mask?

Yes. Metalenz states Polar ID functions with sunglasses, surgical masks, and across all lighting conditions, including total darkness, because it uses an active 940nm near-infrared illuminator rather than ambient visible light. The polarization read does not depend on seeing your full face in color. Apple’s Face ID added mask support in iOS 15.4. Polar ID claims it from day one without a software workaround.

Will The Notch Or Punch-Hole Disappear When Polar ID Ships?

Not entirely. Polar ID hides only the secure face authentication camera. Phones still need a separate selfie camera for video calls and photographs, and current under-display RGB selfie cameras remain visibly hazy. Expect 2027 and 2028 phones to remove the Face ID-style notch while keeping a smaller punch-hole for selfies, unless makers accept an under-display selfie camera with degraded quality.

Is Polar ID Actually More Secure Than Apple Face ID?

Metalenz claims a 0% spoof acceptance rate against printed photos, video replays, and high-quality silicone 3D masks. Apple does not publish a comparable spoof acceptance figure for Face ID. Independent third-party verification of Polar ID is not yet public. Until certification bodies such as FIDO Alliance or iBeta Level 2 publish results, the 0% figure is a vendor claim, not an audited benchmark.

Can Older Phones Be Updated To Use Polar ID?

No. Polar ID is a hardware module that needs the meta-optic camera, the 940nm illuminator, and a compatible image signal processor. No software update can add it to an existing phone. The module also needs an OLED display tuned for near-infrared transmission. Buyers wanting Polar ID will need a phone designed and shipped with the hardware integrated, starting in 2027.

The harder test for Polar ID is not the demo bench at Display Week. It is the first quarter Samsung, Google, or a Chinese OEM ships a phone where the front of the device is unbroken glass and a payment app still clears in under a second. If that quarter lands in 2028, the notch story ends. If it slips, the cutout outlives another generation of phones.