| 摘要 |
<p>An optical diffraction grating is formed from a region of photonic crystalline material (1). Light is coupled into the photonic crystalline material, and the grazingly emergent ouptut beam is collected. The photonic crystalline material may comprise an array of holes formed in a substrate (2) of dielectric material, e.g. InP, and integrated with planar waveguide structures (4).</p> |
