Title:
光偏向デバイス
Document Type and Number:
Japanese Patent JP6945816
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an optical deflection device that reduces dependence on a wavelength or a refraction index of lateral direction angle distribution of a radiation light beam.SOLUTION: An optical deflection device 1 is constituted by a photonic crystal waveguide comprising a lattice array 3 in which low refraction index regions 11a, 11b are periodically arranged on a surface of a high refraction index member 10. In the lattice array, a part in which the low refraction index region is not arranged constitutes a waveguide core 12 that propagates incident light. The lattice array of the optical deflection device constitutes a duplexed periodic structure by means of two periodic arrays of a first periodic array in which the low refraction index region is evenly periodically arranged and a second periodic array. In the duplexed periodic structure, the first periodic array and the second periodic array are in a state having positional deviation to each other for a longitudinal direction of the waveguide core, and the low refraction index region of the lattice array is repeated in different lengths of lattice pitches P1, P2 for the longitudinal direction of the waveguide core.SELECTED DRAWING: Figure 1
Inventors:
Toshihiko Baba
Takee Moe
Hiroyuki Ito
Takee Moe
Hiroyuki Ito
Application Number:
JP2017076111A
Publication Date:
October 06, 2021
Filing Date:
April 06, 2017
Export Citation:
Assignee:
National University Corporation Yokohama National University
International Classes:
G02B6/122
Domestic Patent References:
| JP2008310065A |
Foreign References:
| US20080089640 | ||||
| WO2017126386A1 |
Other References:
竹内萌江,他,光偏向器応用に向けたSiフォトニック結晶導波路構造の探索(II),第64回応用物理学会春季学術講演会講演予稿集,日本,応用物理学会,2017年03月01日,Vol.64th,17p-F204-1
Attorney, Agent or Firm:
Ken Ieiri