光学
光子晶体
绝缘体上的硅
消光比
材料科学
分束器
极化(电化学)
电子束光刻
光电子学
双折射
横模
硅
物理
波长
激光器
化学
物理化学
图层(电子)
抵抗
复合材料
作者
Ethan Schonbrun,Qi Wu,Wounjhang Park,Tsuyoshi Yamashita,Christopher J. Summers
出处
期刊:Optics Letters
[The Optical Society]
日期:2006-10-11
卷期号:31 (21): 3104-3104
被引量:81
摘要
The design and characterization of a photonic crystal (PC) polarization beam splitter (PBS) that operates with an extinction ratio of greater than 15 dB for both polarizations are presented. The PBS is fabricated on a silicon-on-insulator (SOI) wafer where the input and output ports consist of 5 μm wide ridge waveguides. A large spectral shift is observed in the dispersion plots of the lowest-order even (TE-like) and odd (TM-like) modes due to the SOI confinement. Because of this shift, the TE-like mode is close to a directional gap at the top of the band, and the TM-like mode is in a low-frequency regime where the dispersion surface is almost isotropic. We show that the TE-like mode has very high reflection at the interface between the two PCs, whereas the TM-like mode exhibits a very high transmission.
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