中国物理B ›› 2019, Vol. 28 ›› Issue (5): 54203-054203.doi: 10.1088/1674-1056/28/5/054203

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Electrically triggered dual-band tunable terahertz metamaterial band-pass filter based on Si3N4-VO2-Si3N4 sandwich

Shuai Zhao(赵帅), Fangrong Hu(胡放荣), Xinlong Xu(徐新龙), Mingzhu Jiang(江明珠), Wentao Zhang(张文涛), Shan Yin(银珊), Wenying Jiang(姜文英)   

  1. 1 Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronic Technology, Guilin 541004, China;
    2 Nanobiophotonic Center, State Key Laboratory Incubation Base of Photoelectric Technology and Functional Materials, and Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710069, China
  • 收稿日期:2018-12-21 修回日期:2019-01-17 出版日期:2019-05-05 发布日期:2019-05-05
  • 通讯作者: Fangrong Hu E-mail:hufangrong@sina.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11574059, 61565004, and 11774288), the National Technology Major Special Project, China (Grant No. 2017ZX02101007-003), the Natural Science Foundation of Guangxi, China (Grant Nos. 2015GXNSFDA139039 and 2017GXNSFBA198116), the Foundation from Guangxi Key Laboratory of Automatic Detection Technology and Instrument, China (Grant No. YQ16101), and the Innovation Project of Guangxi Graduate Education, China (Grant Nos. 2018YJCX70, 2018YJCX67, and 2018YJCX74).

Electrically triggered dual-band tunable terahertz metamaterial band-pass filter based on Si3N4-VO2-Si3N4 sandwich

Shuai Zhao(赵帅)1, Fangrong Hu(胡放荣)1, Xinlong Xu(徐新龙)2, Mingzhu Jiang(江明珠)1, Wentao Zhang(张文涛)1, Shan Yin(银珊)1, Wenying Jiang(姜文英)1   

  1. 1 Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronic Technology, Guilin 541004, China;
    2 Nanobiophotonic Center, State Key Laboratory Incubation Base of Photoelectric Technology and Functional Materials, and Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710069, China
  • Received:2018-12-21 Revised:2019-01-17 Online:2019-05-05 Published:2019-05-05
  • Contact: Fangrong Hu E-mail:hufangrong@sina.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11574059, 61565004, and 11774288), the National Technology Major Special Project, China (Grant No. 2017ZX02101007-003), the Natural Science Foundation of Guangxi, China (Grant Nos. 2015GXNSFDA139039 and 2017GXNSFBA198116), the Foundation from Guangxi Key Laboratory of Automatic Detection Technology and Instrument, China (Grant No. YQ16101), and the Innovation Project of Guangxi Graduate Education, China (Grant Nos. 2018YJCX70, 2018YJCX67, and 2018YJCX74).

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摘要： We experimentally demonstrate an electrically triggered terahertz (THz) dual-band tunable band-pass filter based on Si3N4-VO2-Si3N4 sandwich-structured hybrid metamaterials. The insulator-metal phase transition of VO2 film is induced by the Joule thermal effect of the top metal layer. The finite-integration-time-domain (FITD) method and finite element method (FEM) are used for numerical simulations. The sample is fabricated using a surface micromachining process, and characterized by a THz time-domain-spectrometer (TDS). When the bias current is 0.225 A, the intensity modulation depths at two central frequencies of 0.56 THz and 0.91 THz are about 81.7% and 81.3%, respectively. This novel design can achieve dynamically electric-thermo-optic modulation in the THz region, and has potential applications in the fields of THz communications, imaging, sensing, and astronomy exploration.

关键词: tunable band-pass filter, hybrid metamaterials, terahertz, vanadium dioxide (VO2)

Abstract: We experimentally demonstrate an electrically triggered terahertz (THz) dual-band tunable band-pass filter based on Si3N4-VO2-Si3N4 sandwich-structured hybrid metamaterials. The insulator-metal phase transition of VO2 film is induced by the Joule thermal effect of the top metal layer. The finite-integration-time-domain (FITD) method and finite element method (FEM) are used for numerical simulations. The sample is fabricated using a surface micromachining process, and characterized by a THz time-domain-spectrometer (TDS). When the bias current is 0.225 A, the intensity modulation depths at two central frequencies of 0.56 THz and 0.91 THz are about 81.7% and 81.3%, respectively. This novel design can achieve dynamically electric-thermo-optic modulation in the THz region, and has potential applications in the fields of THz communications, imaging, sensing, and astronomy exploration.

Key words: tunable band-pass filter, hybrid metamaterials, terahertz, vanadium dioxide (VO2)

中图分类号:  (Filters, zone plates, and polarizers)

  • 42.79.Ci
81.05.Xj (Metamaterials for chiral, bianisotropic and other complex media) 84.30.Vn (Filters)