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基于金属半导体金属亚波长孔阵列的太赫兹滤波器和调制器

发表时间:2012-11-30  浏览量:1263  下载量:388
全部作者: 范飞,姜子伟,刘志强,王湘晖,常胜江
作者单位: 南开大学现代光学研究所
摘 要: 研究一种十字型金属半导体金属(metal-semiconductor-metal, MSM)亚波长孔阵列在太赫兹(terahertz, THz)波段的传输性质和可调谐性质。利用时域有限差分法(finit difference time domain, FDTD),计算该器件在不同浓度半导体载流子注入情况下的透射谱、模式变化和相位移动,并分析不同浓度载流子与金属半导体表面等离子体相互作用导致异常透射峰蓝移的物理机制。结果表明:该器件能实现从中心频率0.71~0.96 THz、带宽100 GHz的可调谐带通滤波和多工作窗口的高灵敏度强度调制,并且能实现在该频率范围内0.88π的宽带相位调制。
关 键 词: 光电子学与激光技术;太赫兹波;金属亚波长孔阵列;表面等离子体;滤波器;调制器
Title: Terahertz filter and modulator based on metal-semiconductor-metal subwavelength hole array
Author: FAN Fei, JIANG Ziwei, LIU Zhiqiang, WANG Xianghui, CHANG Shengjiang
Organization: Institute of Modern Optics, Nankai University
Abstract: The transmission and tuning properties of a cross-shaped subwavelength hole array based on periodic metal-semiconductor-metal (MSM) structures have been investigated in the terahertz regime. We find that the resonance frequency and phase of this device can be actively controlled by the semiconductor injection of the MSM structures, and analyze the physical mechanism of this change. The numerical simulations show that this device acts as a tunable band-pass filter with the central frequency of 0.71-0.96 THz, bandwidth of 100 GHz, a multi operating window intensity modulator, and a phase modulator with a phase modulation depth of 0.88π rad.
Key words: optoelectronics and laser technology; terahertz; metal subwavelength hole array; surface plasmon; filter; modulator
发表期数: 2012年11月第22期
引用格式: 范飞,姜子伟,刘志强,等. 基于金属半导体金属亚波长孔阵列的太赫兹滤波器和调制器[J]. 中国科技论文在线精品论文,2012,5(22):2130-2134.
 
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