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Proceedings Paper

Refractive index insensitive temperature sensor based on a photonic crystal nanobeam cavity
Author(s): Xuepei Li; Chao Wang; Zheng Wang; Zhongyuan Fu; Fujun Sun; Huiping Tian
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Paper Abstract

We present an ambient refractive index (RI) insensitive temperature sensor based on a Silicon-on-Insulator (SOI) ellipse stack major axis modulated photonic crystal (PC) nanobeam cavity (EPCNC). The PC nanobeam cavity is covered with SU-8 cladding to increase the temperature sensitivity by taking advantage of the relatively high thermooptic (TO) coefficient of SU-8 cladding. Three dimensional finite-difference time-domain (3D-FDTD) simulations are used for our analysis. The results show that the sensitivity of temperature sensing is -108.9pm/K. In particular, the proposed sensor not only achieves a competitive temperature sensitivity, but also eliminates the influence of ambient RI on sensing. Therefore, the proposed sensor is potentially a promising platform for future application of temperature sensing.

Paper Details

Date Published: 14 February 2019
PDF: 4 pages
Proc. SPIE 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018), 110484F (14 February 2019); doi: 10.1117/12.2522602
Show Author Affiliations
Xuepei Li, Beijing Univ. of Posts and Telecommunications (China)
Chao Wang, Beijing Univ. of Posts and Telecommunications (China)
Zheng Wang, Beijing Univ. of Posts and Telecommunications (China)
Zhongyuan Fu, Beijing Univ. of Posts and Telecommunications (China)
Fujun Sun, Beijing Univ. of Posts and Telecommunications (China)
Huiping Tian, Beijing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 11048:
17th International Conference on Optical Communications and Networks (ICOCN2018)
Zhaohui Li, Editor(s)

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