Patent ID: 7218798
Filing Date: 2007-05-15
Classification: B82Y,G02B,G02F

Abstract:
1. An optical deflection element comprising: an optical waveguide made of an electrooptic material; a first optical deflector provided on said optical waveguide; and a second optical deflector provided forward of said first optical deflector by overpassing said first optical deflector in a light traveling direction and having a wider deflection angle range than the deflection angle range of said first optical deflector, wherein said second optical deflector includes a first photonic crystal structure having a first periodical structure and a control electrode controlling the deflection angle of a light caused by said first photonic crystal structure by adjusting voltage applied to said first photonic crystal structure, further comprising a second photonic crystal structure having a second periodical structure different from the first periodical structure, the second photonic crystal structure provided in a lateral direction of said first optical deflector and structured by plural kinds of substances that have different refractive indexes and are aligned periodically.