Resonance properties of THz plasmonic dipole-bowtie antenna array: The critical role of the substrate

doi:10.1088/1674-1056/23/12/128702

›› 2014, Vol. 23 ›› Issue (12): 128702-128702.doi: 10.1088/1674-1056/23/12/128702

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Resonance properties of THz plasmonic dipole-bowtie antenna array: The critical role of the substrate

杨玉平^{a b}, Ranjan Singh^b, 张伟力^b

a School of Science, Minzu University of China, Beijing 100081, China;
b School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA

收稿日期:2014-06-17 修回日期:2014-08-18 出版日期:2014-12-15 发布日期:2014-12-15
基金资助:
Project partly supported by the National Natural Science Foundation of China (Grant Nos. 11104360, 11204191, and 11374378), the National Special Fund for the Development of Major Research Equipment and Instruments, China (Grant No. 2012YQ14000508), and the Technology Foundation for Selected Overseas Chinese Scholar.

Resonance properties of THz plasmonic dipole-bowtie antenna array: The critical role of the substrate

Yang Yu-Ping (杨玉平)^{a b}, Ranjan Singh^b, Zhang Wei-Li (张伟力)^b

a School of Science, Minzu University of China, Beijing 100081, China;
b School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA

Received:2014-06-17 Revised:2014-08-18 Online:2014-12-15 Published:2014-12-15
Contact: Yang Yu-Ping E-mail:ypyang_cun@126.com
Supported by:
Project partly supported by the National Natural Science Foundation of China (Grant Nos. 11104360, 11204191, and 11374378), the National Special Fund for the Development of Major Research Equipment and Instruments, China (Grant No. 2012YQ14000508), and the Technology Foundation for Selected Overseas Chinese Scholar.

摘要/Abstract

摘要： Subwavelength arrays of dipole-bowtie antennas are designed and characterized using terahertz time-domain spectroscopy (THz-TDS) and finite element method (FEM) simulations. Two different substrates, silicon and mylar with an order of magnitude difference between their thickness values are used to study the resonance properties of the antennas. The 640-μm thick silicon substrate supports a sharper fundamental mode resonance. We discover that higher-order Fabry–Perot resonances can be excited only in 24-μm thin mylar substrates and show much higher sensitivity to dielectric changes in the environment and the geometrical parameters of the antennas than the fundamental dipole resonance.

关键词: THz-TDS, dipole-bowtie antennas, plasmonic resonator

Abstract: Subwavelength arrays of dipole-bowtie antennas are designed and characterized using terahertz time-domain spectroscopy (THz-TDS) and finite element method (FEM) simulations. Two different substrates, silicon and mylar with an order of magnitude difference between their thickness values are used to study the resonance properties of the antennas. The 640-μm thick silicon substrate supports a sharper fundamental mode resonance. We discover that higher-order Fabry–Perot resonances can be excited only in 24-μm thin mylar substrates and show much higher sensitivity to dielectric changes in the environment and the geometrical parameters of the antennas than the fundamental dipole resonance.

Key words: THz-TDS, dipole-bowtie antennas, plasmonic resonator

中图分类号:

87.50.U-

73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)) 52.40.Fd (Plasma interactions with antennas; plasma-filled waveguides)

杨玉平, Ranjan Singh, 张伟力. Resonance properties of THz plasmonic dipole-bowtie antenna array: The critical role of the substrate[J]. , 2014, 23(12): 128702-128702.

Yang Yu-Ping (杨玉平), Ranjan Singh, Zhang Wei-Li (张伟力). Resonance properties of THz plasmonic dipole-bowtie antenna array: The critical role of the substrate[J]. Chin. Phys. B, 2014, 23(12): 128702-128702.

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Resonance properties of THz plasmonic dipole-bowtie antenna array: The critical role of the substrate

Resonance properties of THz plasmonic dipole-bowtie antenna array: The critical role of the substrate

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