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subwavelength grating devices in silicon photonics

Science Bulletin 2016年第11期61卷 879-888页

作者： Junjia Wang Ivan Glesk Lawrence R.Chen Department of Electrical and Computer Engineering Mc Gill University Department of Electronic and Electrical Engineering University of Strathclyde

subwavelength grating(SWG) waveguides in silicon-on-insulator are emerging as an enabling technology for implementing compact, high-performance photonic integrated devices and circuits for signal processing and sensing applications. We provide an overview of our recent work on developing wavelength selective SWG waveguide filters based on Bragg gratings and ring resonators, as well as optical delay lines. These components increase the SWG waveguide component toolbox and can be used to realize more complex photonic integrated circuits with enhanced or new functionality.

关键词： subwavelength gratings Siliconphotonics Integrated optics - Bragg gratings Ringresonators Optical delay lines

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Polarization characteristics of subwavelength aluminum wire grating in near infrared

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Frontiers of Optoelectronics 2009年第2期2卷 187-191页

作者： Changkui HU Deming LIU College of Optoelectronic Science and Engineering Huazhong University of Science and Technology School of Science Wuhan University of Technology

Rigorous coupled wave analysis（RCWA） was used to investigate the polarization characteristics of subwavelength aluminum wire grating in near *** exposure to the atmosphere, a layer of Al2O3forms rapidly on the aluminum wires, so the effect of metal oxide layers on the polarization properties is modeled and analyzed. It is shown that subwavelength aluminum wire grating with oxide layers forming on the wires still offers excellent polarization properties. As the thickness of the oxide layer increases, the transmission coefficient increases, but the extinction ratio decreases. In addition,a magnesium fluoride（MgF2） layer was proposed to deposit between the aluminum wires and the substrate to enhance transmission coefficient. The theoretical research shows that subwavelength aluminum grid grating has high transmission coefficient and extinction ratio in near infrared, as well as uniform performance with wide variations in the angle of incidence. These features with their small size make it desirable for use in optical communication and allow more compact component designs.

关键词： integrated optics subwavelength gratings polarization-sensitive devices rigorous coupled wave analysis (RCWA)

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