Optical waveguides – Integrated optical circuit
Reexamination Certificate
2007-03-27
2007-03-27
Kim, Ellen E. (Department: 2874)
Optical waveguides
Integrated optical circuit
C372S050124
Reexamination Certificate
active
11288461
ABSTRACT:
An optical element includes a substrate, a surface-emitting type semiconductor laser above the substrate and including a first mirror, an active layer and a second mirror formed in this order from the substrate side, a first optical detection section formed above the substrate, a second optical detection section above the substrate and having a second photoabsorption layer, and an isolation layer between the surface-emitting type semiconductor laser and at least one of the first optical detection section and the second optical detection section. The first optical detection section includes a first photoabsorption layer above the substrate and a photonic crystal section above or below the first photoabsorption layer. The photonic crystal section has a one or a two dimensional photonic crystal structure having a periodic refractive index distribution in a plane that intersects a direction of light incident upon the first optical detection section.
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M. Notomi, et al., “Lasing Action due to the Two-Dimensional Quasiperiodicity of Photonic Quasicrystals with a Penrose Lattice”, Physical Review Letters, The American Physical Society, vol. 92, No. 12, pp. 123906-1-123906-4 (2004).
Harness & Dickey & Pierce P.L.C.
Kim Ellen E.
Seiko Epson Corporation
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