Optical Buffer Device Employing VO2 Embedded on SOI Waveguides With Microring Resonator

• Published in: IEEE photonics journal Vol. 13; no. 2; pp. 1 - 11
• Main Authors: Fan, Lina, Li, Yi, Zhao, Wenqing, Li, Junxian, Zhang, Xin, Peng, Chuang, Wu, Yuda, Zou, Mengdi, Fang, Baoying, Wang, Xiaohua
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.04.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Buffers; Coupling; Finite difference method; Licenses; microring resonator; optical buffer; Optical buffering; Optical distortion; Optical films; Optical filters; Optical properties; Optical pulses; Optical waveguides; Phase change materials; Resonators; Silicon; Vanadium dioxide; Vanadium oxides; VO<named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX"> 2</tex-math> </inline-formula> </named-content>; VO<named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <tex-math notation="LaTeX">$2$</tex-math> </named-content>; Waveguides
• ISSN: 1943-0655; 1943-0647
• DOI: 10.1109/JPHOT.2021.3057233

Phase-change materials (PCMs) have become as promising elements in silicon photonic systems. We propose an optical buffer device based on vanadium dioxide (VO 2 ) embedded on silicon-on-insulator waveguides with a microring resonator. The upload straight waveguide is for coupling light signal from the input port into VO 2 embedded on microring resonator and the download straight waveguide with VO 2 films is for coupling the storage signal to the output port. The optical characteristics of optical buffer device under different structural parameters are analyzed by using finite difference mode simulation (MODE). By controlling the phase state of VO 2 in two coupling regions, the buffer speed of the device can be up to 0.5 ps and buffer time up to 78.28 ps. The optical buffer based on VO 2 is a new way for PCM optical buffer.