Anti-reflection coating for the pass-band of photonic bandgap crystal
US7251402B2 · kind B2 · utility
4Cited by
2References
14Claims
0Family size
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Key dates
| Filing date | Aug 23, 2005 |
| Grant date | Jul 31, 2007 |
| Priority date | — |
| Expiry date | Aug 23, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Light transmission is maximized through the pass band of a photonic bandgap (PBG) crystal (having alternating high- and low-index material) while preserving high reflection for stop band. An anti-reflective coating (ARC) is used to coat the PBG crystal wherein the ARC material has a refractive index of n=(nair×nhigh index material)1/2 and thickness around λc/8 where λc is center wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.