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设计了一种基于串联双环谐振器的4×4无阻塞波长选择路由器。构成该路由器的串联双环谐振器具有良好的箱型滤波曲线,SOI脊波导截面尺寸为波导宽度450 nm,高度220 nm,脊高60 nm,微环半径为10μm,实验可得其3 dB带宽为0.3 nm,消光比为35 dB,带内功率起伏只有0.1 dB,为实现该路由器的功能提供了很好的实验基础。该波长选择路由器有九种非阻塞线路,能够实现四种广播模式路由,其可作为基本光学交换单元,级联多个路由器来构建更强大的片上光网络。

关键词：串联微环谐振器无阻塞波长选择路由器

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Numerical Analysis of Efficiency Enhancement in Plasmonic Thin-Film Solar Cells by Using the SILVACO TCAD Simulator

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Chinese Physics Letters 2012年第6期29卷 246-248页

作者：金恩哲江晓清 Department of Materials Science Kim Il Song UniversityPyongyangD.P.R.Korea Department of Information Science&Electronic Engineering Zhejiang UniversityHangzhou 310027

A physical model for simulating plasmonic solar cells (SCs) using the SILVACO TCAD simulator is establisled and the effects of some factors on the efficiency enhancement of the amorphous silicon thin film SCs are simulated.Through this simulation,it is demonstrated that our method can successfully simulate the optical and electrical properties of plasmonic solar cells without the overestimation of the characteristics and without the neglect of parameter change in the device operation process.It is shown that not only the size and kind of metal nanoparticles but also other factors,such as the surrounding medium,the distance from the bottom of particles to the device surface,and the light incident angle,play important roles in the optical and electrical properties of plasmonic SCs.

关键词： SILVACO Efficiency Solar

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Avalanche-enhanced photocurrents in pin silicon waveguides at 1550 nm wavelength

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Journal of Semiconductors 2013年第6期34卷 81-84页

作者：赵勇徐超江晓清葛辉良 Department of Information Science and Electronics Engineering Zhejiang University Hangzhou Applied Acoustics Research Institute

The photocurrent effect in pin silicon waveguides at 1550 nm wavelength is experimentally investigated. The photocurrent is mainly attributed to surface-state absorption,defect-state absorption and/or two-photon absorption.Experimental results show that the photocurrent is enhanced by the avalanche effect.A pin silicon waveguide with an intrinsic region width of 3.4μm and a length of 2000μm achieves a responsivity of 4.6 mA/W and an avalanche multiplication factor of about five.

关键词： photodetector silicon waveguide photocurrent avalanche effect

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