Free-space-to-waveguide demultiplexer featuring zero-contrast gratings

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• 关键词：Waveguides ; planar ; Integrated optics devices ; Nanostructure fabrication
• 刊名：Optics Communications
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：387
• 期：Complete
• 页码：89-94
• 全文大小：969 K
• 卷排序：387

文摘

The FDTD calculations are conducted to optimize the highest coupling efficiency of HfO2 ZCG filter when the total thickness of HfO2 film is fixed. For the incident light with a wavelength of 650 nm, the proposed polarization splitter exhibits the coupling efficiencies of 10.1% for TE-polarized light and 7.1% for TM-polarized light, respectively. The proposed WDM filter has a calculated splitting ratio of 5.79 dB at 550 nm and 9.67 dB at 650 nm, respectively. The integrated HfO2 ZCG filters are implemented on the 200-nm-thick suspended HfO2 membrane as designed.