A new technical analysis lays out the pros and cons of silicon carbide waveguides, the optical technology Meta showcased in its Orion prototype in September 2024. Anyone tracking AR glasses hardware should care: SiC promises wider fields of view but carries costs and defects that could slow mass adoption.
What actually happened
Meta demonstrated silicon carbide (SiC) diffractive waveguides in its Orion prototype at Meta Connect in September 2024, supporting a 70-degree field of view, according to Silicon Carbide Waveguides Pros and Cons. Meta detailed the material case in a January 2025 SPIE paper. China-based firms SEEV, Moldnano, LLVision, and Goeroptics were reportedly developing SiC waveguides before Orion and are moving toward production. Coherent has promoted SiC substrates in the US since 2024, and Magic Leap has confirmed its own SiC work. On 29 October 2025, SEEV co-founder Dr Shi Rui gave a keynote on mass production of SiC diffractive waveguide chips. On 28 August 2026, the Nimbo X1 Kickstarter launched using a SEEV SiC waveguide. SiC's refractive index reaches about 2.6, versus 1.7 to 2.0 for typical glass, with thermal conductivity 200 to 400 times higher.
How we got here
Diffractive waveguides have historically used three gratings, but WaveOptics, acquired by Snap in 2021, pioneered a two-grating design that Meta calls its butterfly architecture. Even Realities' G1 and G2 glasses already use SEEV glass-based two-grating waveguides, and Vuzix appeared to adopt the same approach at CES 2026. Separately, Moldnano and Westlake University published SiC waveguide research in SpringerOpen's eLight journal and at SPIE AR/VR/MR 2026, while LLVision's paper appeared in Photonics in September 2025. These publications form the technical backbone behind claims that SiC can deliver full color and reduced rainbow artifacts in a single waveguide layer.
Why this matters for you
For builders, SiC's higher refractive index allows thinner waveguides and wider fields of view, but small wafer sizes, low yield, and difficult polishing keep manufacturing costs high. Optical drawbacks matter too: color dispersion and birefringence cause visible color unevenness, and higher reflectivity can create ghost images. Users buying early SiC-based devices, like the Nimbo X1, should expect tradeoffs between field of view and image consistency. For companies building AR hardware, the shift toward two-grating designs suggests smaller form factors may arrive before SiC costs fall enough for mass-market pricing. Investors watching the AR supply chain should track wafer costs, not just headline field-of-view specs.
The bigger question
If silicon carbide waveguides remain costly and optically imperfect, will the AR industry wait for the material to mature, or shift toward two-grating glass designs that trade field of view for affordability and clarity? The answer could determine whether the next wave of smart glasses looks like Meta's ambitious Orion concept or Even Realities' more compact, glass-based approach. Either path reshapes what consumers can expect from wearable displays in the next few years.
What to watch
Watch for further SiC production updates following SEEV's October 2025 keynote and the Nimbo X1 Kickstarter, which launched 28 August 2026. Karl Guttag will present on waveguide technology at MicroLED and AR/VR Connect in Eindhoven, 15 to 17 September 2026. Bonuz will continue tracking how waveguide costs and optical quality evolve as smart glasses move toward mainstream adoption.
