Abstract
| Language | English |
|---|---|
| Pages | 25149-25160 |
| Number of pages | 12 |
| Journal | Optics Express |
| Volume | 22 |
| Issue number | 21 |
| Early online date | 7 Oct 2014 |
| DOIs | |
| Publication status | Published - 20 Oct 2014 |
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Keywords
- terahertz surface plasmon resonance
- prism coupling
- spoof surface plasmon polariton
- terahertz sensing
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High-mode spoof SPP of periodic metal grooves for ultra-sensitive terahertz sensing. / Yao, Haizi; Zhong, Shuncong.
In: Optics Express, Vol. 22, No. 21, 20.10.2014, p. 25149-25160.Research output: Contribution to journal › Article
TY - JOUR
T1 - High-mode spoof SPP of periodic metal grooves for ultra-sensitive terahertz sensing
AU - Yao, Haizi
AU - Zhong, Shuncong
N1 - © 2014 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.
PY - 2014/10/20
Y1 - 2014/10/20
N2 - We report terahertz surface plasmon resonance (SPR) sensing based on prism-coupling to the spoof surface plasmon polariton (SSPP) mode existing on periodically grooved metal films. It was demonstrated that, except for the fundamental mode of the SSPP, there was also a higher mode SSPP wave when the depth of groove was larger. Both fundamental and high-order modes of SSPP could be used for terahertz sensing. We compared the performance of different modes of SSPP on the sensing sensitivity using both reflection amplitude and phase-jump information. The results indicated that the gap distance between the prism base and the metal film had a significant influence on the reflectivity of SPR sensing by affecting the coupling efficiency of an evanescent wave to an SSPP wave; also, high-order mode SSPP-based sensing had a high sensitivity of up to 2.27 THz/RIU, which nearly doubled the sensitivity of the fundamental mode. The application of high-mode SSPP has enormous potential for ultra-sensitive SPR sensing in the terahertz regime.
AB - We report terahertz surface plasmon resonance (SPR) sensing based on prism-coupling to the spoof surface plasmon polariton (SSPP) mode existing on periodically grooved metal films. It was demonstrated that, except for the fundamental mode of the SSPP, there was also a higher mode SSPP wave when the depth of groove was larger. Both fundamental and high-order modes of SSPP could be used for terahertz sensing. We compared the performance of different modes of SSPP on the sensing sensitivity using both reflection amplitude and phase-jump information. The results indicated that the gap distance between the prism base and the metal film had a significant influence on the reflectivity of SPR sensing by affecting the coupling efficiency of an evanescent wave to an SSPP wave; also, high-order mode SSPP-based sensing had a high sensitivity of up to 2.27 THz/RIU, which nearly doubled the sensitivity of the fundamental mode. The application of high-mode SSPP has enormous potential for ultra-sensitive SPR sensing in the terahertz regime.
KW - terahertz surface plasmon resonance
KW - prism coupling
KW - spoof surface plasmon polariton
KW - terahertz sensing
U2 - 10.1364/OE.22.025149
DO - 10.1364/OE.22.025149
M3 - Article
VL - 22
SP - 25149
EP - 25160
JO - Optics Express
T2 - Optics Express
JF - Optics Express
SN - 1094-4087
IS - 21
ER -