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题名: Plasmonic terahertz modulator based on a grating-coupled two-dimensional electron system
作者: Huang, YD(黄永丹); Yu, Y(余耀); Qin, H(秦华); Sun, JD(孙建东); Zhang, ZP(张志鹏); Li, XX(李欣幸); Huang, JJ; Cai, Y(蔡勇)
通讯作者: Huang, YD(黄永丹) ; Qin, H(秦华)
刊名: APPLIED PHYSICS LETTERS
发表日期: 2016
DOI: 10.1063/1.4967998
卷: 109, 期:20
收录类别: SCI ; EI
文章类型: 期刊论文
部门归属: 纳米器件及相关材料研究部
英文摘要: Electrically driven broadband modulator with large modulation depth and high speed is in high demand to meet the technical advancing and applications in terahertz fields recently. So far, the single-particle non-resonant absorption mechanism described by the Drude conductivity has been utilized in most of the related researches but is still not efficient enough. Here we proposed and demonstrated a terahertz modulator based on the collective electron plasma excitations (plasmons) in a grating-coupled two-dimensional electron gas in GaN/AlGaN heterostructure. By switching between the resonant and non-resonant conditions of the 2D plasmon excitation enabled by applying proper gate biases, the transmission of terahertz electromagnetic waves can be efficiently manipulated. Taking advantage of its resonant characteristic combined with the strong electric field enhancement in the active region, we experimentally achieved a maximum intensity modulation depth of 93%, a 3 dB operation bandwidth of similar to 400 kHz, and a small required driving voltage amplitude of 2 V at a cryogenic temperature of 8.7 K. Owing to its excellent performances, this active plasmon-based terahertz modulator may offer some promising solutions in several fields of terahertz technology in the future. Published by AIP Publishing.
关键词[WOS]: SPATIAL LIGHT MODULATORS ; FIELD-EFFECT TRANSISTORS ; RADIATION ; WAVES ; METAMATERIALS ; GAS
语种: 英语
JCR小类分区: 二区
WOS记录号: WOS:000388000000010
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinano.ac.cn/handle/332007/4844
Appears in Collections:纳米器件及相关材料研究部_秦华团队_期刊论文

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Recommended Citation:
Huang, YD,Yu, Y,Qin, H,et al. Plasmonic terahertz modulator based on a grating-coupled two-dimensional electron system[J]. APPLIED PHYSICS LETTERS,2016,109(20).
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