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Two-dimensional photonic crystal and optical device using the same

外国特許コード F110003701
整理番号 701
掲載日 2011年7月4日
出願国 アメリカ合衆国
出願番号 79419205
公報番号 20080124037
公報番号 7912335
出願日 平成17年12月28日(2005.12.28)
公報発行日 平成20年5月29日(2008.5.29)
公報発行日 平成23年3月22日(2011.3.22)
国際出願番号 JP2005024066
国際公開番号 WO2006070867
国際出願日 平成17年12月28日(2005.12.28)
国際公開日 平成18年7月6日(2006.7.6)
優先権データ
  • 特願2004-378706 (2004.12.28) JP
  • 2005WO-JP24066 (2005.12.28) WO
発明の名称 (英語) Two-dimensional photonic crystal and optical device using the same
発明の概要(英語) (US7912335)
An object of the present invention is to provide a two-dimensional photonic crystal in which conditions for both the TE-polarized light and the TM-polarized light can be easily satisfied.
A body includes a first area having a triangular lattice pattern arrangement of a circular hole and a second area having a triangular lattice pattern arrangement of an equilateral triangular holes.
Therefore, the TE-PBG which is a photonic band gap (PBG) for the TE-polarized light is created in the first area, and the TM-PBG which is a PBG for the TM-polarized light is created in the second area.
Parameters such as the period and size of the holes can be independently set for the first area and the second area, so that an energy region common to the TE-PBG and the TM-PBG (i.e. absolute PBG) can be made larger and easily created.
Forming a waveguide and resonators and or the like corresponding to an energy within the absolute PBG allows formation of a polarized light multiplexer/demultiplexer and a frequency (wavelength) multiplexer/demultiplexer without depending on polarized light or the like.
特許請求の範囲(英語) [claim1]
1. A two-dimensional photonic crystal having a periodic arrangement of refractive index distribution in a slab-shaped body, comprising: a) a first area having a photonic band gap for TE-polarized light; and
b) a second area provided adjacent to the first area and having a photonic band gap for TM-polarized light, in which at least a part of an energy region is common to the photonic band gap of the TE-polarized light,
wherein a waveguide passing through both the first area and the second area is provided for conducting light having energy within the part of the common energy region, the waveguide being defects created linearly in the first area connected to defects created linearly in the second area, and passing continuously through both the first and second areas, and
a resonator is provided in the vicinity of the waveguides of the first area and the second area respectively, where the resonator resonates with the polarized light corresponding to the area.
[claim2]
2. The two-dimensional photonic crystal according to claim 1, wherein a second waveguide passing through either the first area or the second area and interposing the resonator of the given area with the waveguide is formed.
[claim3]
3. The two-dimensional photonic crystal according to claim 1, wherein a second waveguide passing through both of the first area and the second area and interposing the resonators of the both areas with the waveguide is formed.
[claim4]
4. A two-dimensional photonic crystal wherein the two-dimensional photonic crystal according to claim 1 functions as a single construction unit; a plurality of the construction units are connected; and waveguides in the entire construction units are connected continuously.
[claim5]
5. The two-dimensional photonic crystal according to claim 1, wherein the body thickness is consistent in the entire areas.
[claim6]
6. An optical function element using the two-dimensional photonic crystal according to claim 1.
[claim7]
7. The two-dimensional photonic crystal according to claim 1, wherein the refractive index distribution of the first area has a triangular lattice pattern arrangement of modified refractive index areas of a circular shape, and the refractive index distribution of the second area has a triangular lattice pattern arrangement of modified refractive index areas of an equilateral triangular shape.
  • 発明者/出願人(英語)
  • NODA SUSUMU
  • ASANO TAKASHI
  • TAKAYAMA SEIICHI
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • TDK
国際特許分類(IPC)
米国特許分類/主・副
  • 385/129
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