光学
消光比
栅栏
材料科学
分束器
波长
折射率
电子束光刻
节拍(声学)
极化(电化学)
插入损耗
光电子学
物理
抵抗
激光器
化学
物理化学
图层(电子)
复合材料
作者
Lu Liu,Qingzhong Deng,Zhen Zhou
出处
期刊:Optics Letters
[The Optical Society]
日期:2016-11-01
卷期号:41 (21): 5126-5126
被引量:71
摘要
A polarization beam splitter assisted by a subwavelength grating (SWG) is proposed. The SWG enables nearly 20-fold beat length reduction for TE, which makes the high extinction ratio (ER) possible. On the other hand, the embedded SWG preferably affects the refractive index of the even mode in the coupling region and broadens the bandwidth of the splitter. As a result, the ER of 28.7 dB (24.8 dB) for TE (TM) is obtained, while the insertion loss is only 0.10 dB (0.11 dB) at the wavelength of 1550 nm. The ER is more than 10 dB in the wavelength range of 1450-1625 nm for TE and 1495-1610 nm for TM.
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