发明授权
- 专利标题: Two-dimensional photonic crystal having air-bridge structure and method for manufacturing such a crystal
- 专利标题(中): 具有气桥结构的二维光子晶体及其制造方法
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申请号: US12004029申请日: 2007-12-20
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公开(公告)号: US07509014B2公开(公告)日: 2009-03-24
- 发明人: Ranko Hatsuda , Susumu Noda , Takashi Asano , Yoshinori Tanaka , Eiji Miyai
- 申请人: Ranko Hatsuda , Susumu Noda , Takashi Asano , Yoshinori Tanaka , Eiji Miyai
- 申请人地址: JP Kyoto JP Tokyo
- 专利权人: Kyoto University,TDK Corporation
- 当前专利权人: Kyoto University,TDK Corporation
- 当前专利权人地址: JP Kyoto JP Tokyo
- 代理机构: Oliff & Berridge, PLC
- 优先权: JP2003-307657 20030829; JP2003-409208 20031208; JP2003-409209 20031208
- 主分类号: G02B6/00
- IPC分类号: G02B6/00 ; G02B6/10
摘要:
The present invention intends to provide a two-dimensional photonic crystal having a high level of mechanical strength and functioning as a high-efficiency resonator. The two-dimensional photonic crystal according to the present invention includes a slab layer 31 under which a clad layer 32 is located. In the slab layer 31, areas 35 having a refractive index different from that of the slab layer 31 are cyclically arranged to create a two-dimensional photonic crystal. A portion of the cyclic arrangement of the areas 35 are omitted to form a point-like defect 36. This defect 36 functions as a resonator at which a specific wavelength of light resonates. An air-bridge cavity 37 facing the point-like defect 36 is formed over a predetermined range of the clad layer 32. In this construction, the clad layer 32 supports the slab layer 31 except for the range over which the air-bridge space 37 is formed. Therefore, the two-dimensional photonic crystal has a high level of mechanical strength. The presence of the air-bridge space 37 under the point-like defect 36 makes it easy to confine light at the point-like defect 36 by the difference in the refractive index between the slab layer 31 and the air. Thus, the point-like defect 36 functions as a high-performance resonator.