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Thermal analysis for fast thermal-response Si waveguide wrapped by SiN

Thermal analysis for fast thermal-response Si waveguide wrapped by SiN

作     者:Rui MIN Ruiqiang JI Lin YANG 

作者机构:Optoelectronic System LaboratoryInstitute of SemiconductorsChinese Academy of SciencesBeijing 100083China 

出 版 物:《Frontiers of Optoelectronics》 (光电子前沿(英文版))

年 卷 期:2012年第5卷第1期

页      面:73-77页

学科分类:070207[理学-光学] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 0702[理学-物理学] 

基  金:Acknowledgements This work was supported by the National Natural Science Foundation of China (Grant No. 60977037)  and the National High Technology Research and Development Program of China (No. 2009AA03Z416) 

主  题:thermo-optic SiN Si waveguide rise time 

摘      要:A new type of Si waveguide wrapped by silicon nitride (SIN) is designed, and its optical and thermal analysis are presented. The thickness of SiN up-cladding should be larger than 1 pm in order to prevent the absorption of optical field by metal heater. Thermal response of the proposed waveguide structure is enhanced by the high thermal conductivity of SiN. Moreover, this thermal response can be further improved by a fast heat dissipation channel created in this structure. Our simula- tion results indicate that a rise time of about 110 ns can be achieved for the proposed waveguide structure, which is about two orders of magnitude less than that of the conventional Si waveguide. The influences of the thickness of up-cladding and the stretching width and etching depth on the thermal performance are also discussed. The simulation shows thin up-cladding, large stretching width and etching depth are critical to enhance the thermal response speed.

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