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US 7,317,860 B2Granted
Optical device having photonic crystal structure
AssigneeFujitsu Limited
InventorsTsuyoshi Aoki, Masao Kondo, Kazuaki Kurihara
Life of this patent
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Abstract
A photonic crystal structural body has a structure that a second mediums whose refractive index changes with an external field is periodically distributed in a first medium whose refractive index changes with the external field. An external field generator applies the external field to the photonic crystal structural body. It is possible to increase a change amount of a photonic band gap.
Claims8
An optical device comprising:
- a photonic crystal structural body having a first medium and second mediums, refractive indices of the first medium and the second mediums changing with an external field, the second mediums being periodically distributed along an in-lane direction in the first medium;
- and
- external field generator for applying the external field to the photonic crystal structural body,
- wherein said external field is an electric field or a laser light.
1 more element
Dependencies are inferred from the claim text.