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Sensors 2015, 15(4), 8481-8498; doi:10.3390/s150408481

Noninvasive and Real-Time Plasmon Waveguide Resonance Thermometry

1
Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Institute of optical imaging and sensing, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
2
Department of Physics, Tsinghua University, Beijing 100084, China
3
Institute of Green Chemistry and Energy, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
4
MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, South China Normal University, Guangzhou 510631, China
*
Author to whom correspondence should be addressed.
Academic Editors: Gary R. Pickrell and Daniel Homa
Received: 21 January 2015 / Revised: 2 April 2015 / Accepted: 8 April 2015 / Published: 13 April 2015
(This article belongs to the Special Issue Optical Sensors for Chemical, Biological and Industrial Applications)
View Full-Text   |   Download PDF [744 KB, uploaded 14 April 2015]   |  

Abstract

In this paper, the noninvasive and real-time plasmon waveguide resonance (PWR) thermometry is reported theoretically and demonstrated experimentally. Owing to the enhanced evanescent field and thermal shield effect of its dielectric layer, a PWR thermometer permits accurate temperature sensing and has a wide dynamic range. A temperature measurement sensitivity of 9.4 × 10−3 °C is achieved and the thermo optic coefficient nonlinearity is measured in the experiment. The measurement of water cooling processes distributed in one dimension reveals that a PWR thermometer allows real-time temperature sensing and has potential to be applied for thermal gradient analysis. Apart from this, the PWR thermometer has the advantages of low cost and simple structure, since our transduction scheme can be constructed with conventional optical components and commercial coating techniques. View Full-Text
Keywords: plasmon waveguide resonance; thermometry; thermo optic effect; optical temperature sensor plasmon waveguide resonance; thermometry; thermo optic effect; optical temperature sensor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zhang, P.; Liu, L.; He, Y.; Zhou, Y.; Ji, Y.; Ma, H. Noninvasive and Real-Time Plasmon Waveguide Resonance Thermometry. Sensors 2015, 15, 8481-8498.

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