Low Birefringence and 2-D Optical Confinement of Hollow Waveguide With Distributed Bragg Reflector and High-Index-Contrast Grating
Low Birefringence and 2-D Optical Confinement of Hollow Waveguide With Distributed Bragg Reflector and High-Index-Contrast Grating
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DOI：
10.1109/jphot.2009.2027027
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发表时间：
2009-07
影响因子：
2.4
通讯作者：
Mukesh Kumar;C. Chase;V. Karagodsky;Takahiro Sakaguchi;Fumio Koyama;Connie J. Chang-Hasnain
中科院分区：
文献类型：
--
作者：
Mukesh Kumar;C. Chase;V. Karagodsky;Takahiro Sakaguchi;Fumio Koyama;Connie J. Chang-Hasnain
提出了一种中空光波导，其中光可以被限制在分布式布拉格反射（DBR）镜和高折射率对比度光栅（HCG）镜之间的气隙中。由于垂直（DBR）和横向（HCG）周期性的综合影响，所提出的空心波导显示出10-4量级的小模态双折射。此外，图案化的 HCG 被证明可以提供 2-D 光学限制，这是实用的紧凑型光子器件的重要要求。所提出的空心波导被制造出来，并通过实验证明了 5 倍 10-4 的低双折射。
A hollow optical waveguide is proposed in which light can be confined in an air gap between a distributed Bragg reflecting (DBR) mirror and a high-index-contrast grating (HCG) mirror. Because of the combined effect of vertical (DBR) and lateral (HCG) periodicity, the proposed hollow waveguide shows a small modal birefringence on the order of 10-4 . In addition, a patterned HCG is shown to provide 2-D optical confinement, which is an important requirement for practical compact photonic devices. The proposed hollow waveguide is fabricated, and a low birefringence of 5 times 10-4 is demonstrated experimentally.