High sensitivity refractive index gas sensing enhanced by surface plasmon resonance with nano-cavity antenna array

doi:10.1088/1674-1056/21/8/087104

中国物理B ›› 2012, Vol. 21 ›› Issue (8): 87104-087104.doi: 10.1088/1674-1056/21/8/087104

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

High sensitivity refractive index gas sensing enhanced by surface plasmon resonance with nano-cavity antenna array

赵华君

Institute of Information Optoelectronics Technology and Application, Departments of Electronic and Electrical Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China

收稿日期:2011-11-21 修回日期:2012-01-13 出版日期:2012-07-01 发布日期:2012-07-01
基金资助:
Project supported by the Natural Science Foundation of Chongqing Science and Technology Program, China (Grant No. CSTC, 2010BB2352) and the Fund of Chongqing Education Committee (Grant No. KJ121224).

High sensitivity refractive index gas sensing enhanced by surface plasmon resonance with nano-cavity antenna array

Zhao Hua-Jun (赵华君 )

Institute of Information Optoelectronics Technology and Application, Departments of Electronic and Electrical Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China

Received:2011-11-21 Revised:2012-01-13 Online:2012-07-01 Published:2012-07-01
Contact: Zhao Hua-Jun E-mail:zhaohjcu@163.com
Supported by:
Project supported by the Natural Science Foundation of Chongqing Science and Technology Program, China (Grant No. CSTC, 2010BB2352) and the Fund of Chongqing Education Committee (Grant No. KJ121224).

摘要/Abstract

摘要： The surface plasmon resonance gas sensor is presented for refractive index detection using nano-cavity antenna array. The gas sensor monitors the changes of the refractive index by measuring the spectral shift of the resonance dip, for modulating the wavelength of incident light. It is demonstrated that minute changes in the refractive index of a medium close to the surface of a metal film, owing to a shift in the resonance dip of the wavelength, can be detected. The average detection sensitivity is about 3200 nm/RIU (refractive index units), which is twice more than that of metal grating-based gas sensor. The reflectivity of the surface plasmon resonance dip is only ～ 0.03%, and the full widths at half maximum (FWHMs) of bandwidth of the angle and wavelength are ～ 0.20° and 4.71 nm, respectively.

关键词: subwavelength structures, sensor, resonators, surface plasmons

Abstract: The surface plasmon resonance gas sensor is presented for refractive index detection using nano-cavity antenna array. The gas sensor monitors the changes of the refractive index by measuring the spectral shift of the resonance dip, for modulating the wavelength of incident light. It is demonstrated that minute changes in the refractive index of a medium close to the surface of a metal film, owing to a shift in the resonance dip of the wavelength, can be detected. The average detection sensitivity is about 3200 nm/RIU (refractive index units), which is twice more than that of metal grating-based gas sensor. The reflectivity of the surface plasmon resonance dip is only ～ 0.03%, and the full widths at half maximum (FWHMs) of bandwidth of the angle and wavelength are ～ 0.20° and 4.71 nm, respectively.

Key words: subwavelength structures, sensor, resonators, surface plasmons

中图分类号: (Charge-density-wave systems)

71.45.Lr

87.19.lt (Sensory systems: visual, auditory, tactile, taste, and olfaction) 73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

赵华君 . High sensitivity refractive index gas sensing enhanced by surface plasmon resonance with nano-cavity antenna array[J]. 中国物理B, 2012, 21(8): 87104-087104.

Zhao Hua-Jun (赵华君 ). High sensitivity refractive index gas sensing enhanced by surface plasmon resonance with nano-cavity antenna array[J]. Chin. Phys. B, 2012, 21(8): 87104-087104.

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High sensitivity refractive index gas sensing enhanced by surface plasmon resonance with nano-cavity antenna array

High sensitivity refractive index gas sensing enhanced by surface plasmon resonance with nano-cavity antenna array

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