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Proceedings Paper

High-Q resonance near zero wave vector in photonic crystal slab for label-free sensing
Author(s): Yonghao Liu; Shuling Wang; Weidong Zhou; Yuze Sun
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Paper Abstract

We report here experimental result of refractive index (RI) sensing using the singly degenerate high quality (Q) factor mode in photonic crystal slab (PCS) with the incident beam close to normal incidence. Q = 3.2×104 was measured with high extinction ratio (ER > 10 dB) for the PCS in air. Q = 1.8×104 and spectral sensitivity (S) of 94.5 nm/RIU were measured in liquid for the PCS. A detection limit (DL) of 10-5 RIU has been achieved with our device. The high-Q for the singly degenerate mode close to normal incidence with relatively high S is very promising to achieve a lower DL for RI sensing.

Paper Details

Date Published: 20 February 2017
PDF: 7 pages
Proc. SPIE 10108, Silicon Photonics XII, 1010810 (20 February 2017); doi: 10.1117/12.2251548
Show Author Affiliations
Yonghao Liu, The Univ. of Texas at Arlington (United States)
Shuling Wang, The Univ. of Texas at Arlington (United States)
Weidong Zhou, The Univ. of Texas at Arlington (United States)
Yuze Sun, The Univ. of Texas at Arlington (United States)


Published in SPIE Proceedings Vol. 10108:
Silicon Photonics XII
Graham T. Reed; Andrew P. Knights, Editor(s)

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