中国物理B ›› 2014, Vol. 23 ›› Issue (6): 67301-067301.doi: 10.1088/1674-1056/23/6/067301

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Electrically tunable resonant terahertz transmission in subwavelength hole arrays

张莹a b, 刘应开a, 韩家广b   

  1. a School of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, China;
    b Center for Terahertz Wave, Key Laboratory of Opto-electronic Information Technology, Ministry of Education, College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
  • 收稿日期:2013-11-20 修回日期:2014-01-25 出版日期:2014-06-15 发布日期:2014-06-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61007034).

Electrically tunable resonant terahertz transmission in subwavelength hole arrays

Zhang Ying (张莹)a b, Liu Ying-Kai (刘应开)a, Han Jia-Guang (韩家广)b   

  1. a School of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, China;
    b Center for Terahertz Wave, Key Laboratory of Opto-electronic Information Technology, Ministry of Education, College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
  • Received:2013-11-20 Revised:2014-01-25 Online:2014-06-15 Published:2014-06-15
  • Contact: Liu Ying-Kai, Han Jia-Guang E-mail:liuyingkai99@163.com;jiaghan@tju.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61007034).

摘要: An actively enhanced resonant transmission in a plasmonic array of subwavelength holes is demonstrated by use of terahertz time-domain spectroscopy. By connecting this two-dimensional element into an electrical circuit, tunable resonance enhancement is observed in arrays made from good and relatively poor metals. The tunable feature is attributed to the nonlinear electric response of the periodic hole array film, which is confirmed by its voltage-current behavior. This finding could lead to a unique route to active plasmonic devices, such as tunable filters, spatial modulators, and integrated terahertz optoelectronic components.

关键词: surface plasmons, enhanced terahertz transmission, electrically tunable

Abstract: An actively enhanced resonant transmission in a plasmonic array of subwavelength holes is demonstrated by use of terahertz time-domain spectroscopy. By connecting this two-dimensional element into an electrical circuit, tunable resonance enhancement is observed in arrays made from good and relatively poor metals. The tunable feature is attributed to the nonlinear electric response of the periodic hole array film, which is confirmed by its voltage-current behavior. This finding could lead to a unique route to active plasmonic devices, such as tunable filters, spatial modulators, and integrated terahertz optoelectronic components.

Key words: surface plasmons, enhanced terahertz transmission, electrically tunable

中图分类号:  (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

  • 73.20.Mf
42.25.Bs (Wave propagation, transmission and absorption) 78.66.-w (Optical properties of specific thin films)