Experimental demonstration of ultrasensitive sensing with terahertz metamaterial absorbers: A comparison with the metasurfaces

Planar metasurfaces and plasmonic resonators have shown great promise for sensing applications across the electromagnetic domain ranging from the microwaves to the optical frequencies. However, these sensors suffer from lower figure of merit and sensitivity due to the radiative and the non-radiative...

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Main Authors: Cong, Longqing, Tan, Siyu, Yahiaoui, Riad, Yan, Fengping, Zhang, Weili, Singh, Ranjan
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2015
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Online Access:https://hdl.handle.net/10356/107143
http://hdl.handle.net/10220/25318
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1071432023-02-28T19:29:54Z Experimental demonstration of ultrasensitive sensing with terahertz metamaterial absorbers: A comparison with the metasurfaces Cong, Longqing Tan, Siyu Yahiaoui, Riad Yan, Fengping Zhang, Weili Singh, Ranjan School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies (CDPT) Physics and Applied Physics Planar metasurfaces and plasmonic resonators have shown great promise for sensing applications across the electromagnetic domain ranging from the microwaves to the optical frequencies. However, these sensors suffer from lower figure of merit and sensitivity due to the radiative and the non-radiative loss channels in the plasmonic metamaterial systems. We demonstrate a metamaterial absorber based ultrasensitive sensing scheme at the terahertz frequencies with significantly enhanced sensitivity and an order of magnitude higher figure of merit compared to planar metasurfaces. Magnetic and electric resonant field enhancement in the impedance matched absorber cavity enables stronger interaction with the dielectric analyte. This finding opens up opportunities for perfect metamaterial absorbers to be applied as efficient sensors in the finger print region of the electromagnetic spectrum with several organic, explosive, and bio-molecules that have unique spectral signature at the terahertz frequencies. Published version 2015-04-06T07:03:25Z 2019-12-06T22:25:35Z 2015-04-06T07:03:25Z 2019-12-06T22:25:35Z 2015 2015 Journal Article Cong, L., Tan, S., Yahiaoui, R., Yan, F., Zhang, W., & Singh, R. (2015). Experimental demonstration of ultrasensitive sensing with terahertz metamaterial absorbers: A comparison with the metasurfaces. Applied Physics Letters, 106(3), 031107-. https://hdl.handle.net/10356/107143 http://hdl.handle.net/10220/25318 10.1063/1.4906109 en Applied Physics Letters © 2015 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4906109].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Physics and Applied Physics
spellingShingle Physics and Applied Physics
Cong, Longqing
Tan, Siyu
Yahiaoui, Riad
Yan, Fengping
Zhang, Weili
Singh, Ranjan
Experimental demonstration of ultrasensitive sensing with terahertz metamaterial absorbers: A comparison with the metasurfaces
description Planar metasurfaces and plasmonic resonators have shown great promise for sensing applications across the electromagnetic domain ranging from the microwaves to the optical frequencies. However, these sensors suffer from lower figure of merit and sensitivity due to the radiative and the non-radiative loss channels in the plasmonic metamaterial systems. We demonstrate a metamaterial absorber based ultrasensitive sensing scheme at the terahertz frequencies with significantly enhanced sensitivity and an order of magnitude higher figure of merit compared to planar metasurfaces. Magnetic and electric resonant field enhancement in the impedance matched absorber cavity enables stronger interaction with the dielectric analyte. This finding opens up opportunities for perfect metamaterial absorbers to be applied as efficient sensors in the finger print region of the electromagnetic spectrum with several organic, explosive, and bio-molecules that have unique spectral signature at the terahertz frequencies.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Cong, Longqing
Tan, Siyu
Yahiaoui, Riad
Yan, Fengping
Zhang, Weili
Singh, Ranjan
format Article
author Cong, Longqing
Tan, Siyu
Yahiaoui, Riad
Yan, Fengping
Zhang, Weili
Singh, Ranjan
author_sort Cong, Longqing
title Experimental demonstration of ultrasensitive sensing with terahertz metamaterial absorbers: A comparison with the metasurfaces
title_short Experimental demonstration of ultrasensitive sensing with terahertz metamaterial absorbers: A comparison with the metasurfaces
title_full Experimental demonstration of ultrasensitive sensing with terahertz metamaterial absorbers: A comparison with the metasurfaces
title_fullStr Experimental demonstration of ultrasensitive sensing with terahertz metamaterial absorbers: A comparison with the metasurfaces
title_full_unstemmed Experimental demonstration of ultrasensitive sensing with terahertz metamaterial absorbers: A comparison with the metasurfaces
title_sort experimental demonstration of ultrasensitive sensing with terahertz metamaterial absorbers: a comparison with the metasurfaces
publishDate 2015
url https://hdl.handle.net/10356/107143
http://hdl.handle.net/10220/25318
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