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Sensors 2011, 11(2), 1992-2000; doi:10.3390/s110201992
Article

Compact on-Chip Temperature Sensors Based on Dielectric-Loaded Plasmonic Waveguide-Ring Resonators

,
*  and
Institute of Technology and Innovation, University of Southern Denmark, Niels Bohrs Alle 1, DK-5230 Odense M, Denmark
* Author to whom correspondence should be addressed.
Received: 10 December 2010 / Revised: 14 January 2011 / Accepted: 30 January 2011 / Published: 7 February 2011
(This article belongs to the Section Physical Sensors)
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Abstract

The application of a waveguide-ring resonator based on dielectric-loaded surface plasmon-polariton waveguides as a temperature sensor is demonstrated in this paper and the influence of temperature change to the transmission through the waveguide-ring resonator system is comprehensively analyzed. The results show that the roundtrip phase change in the ring resonator due to the temperature change is the major reason for the transmission variation. The performance of the temperature sensor is also discussed and it is shown that for a waveguide-ring resonator with the resonator radius around 5 mm and waveguide-ring gap of 500 nm which gives a footprint around 140 µm2, the temperature sensitivity at the order of 10−2 K can be achieved with the input power of 100 mW within the measurement sensitivity limit of a practical optical detector.
Keywords: temperature sensor; dielectric-loaded surface plasmon-polariton waveguide; waveguide-ring resonator temperature sensor; dielectric-loaded surface plasmon-polariton waveguide; waveguide-ring resonator
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Andersen, T.B.; Han, Z.; Bozhevolnyi, S.I. Compact on-Chip Temperature Sensors Based on Dielectric-Loaded Plasmonic Waveguide-Ring Resonators. Sensors 2011, 11, 1992-2000.

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