High-Q resonance near zero wave vector in photonic crystal slab for label-free sensing

Yonghao Liu; Shuling Wang; Weidong Zhou; Yuze Sun

doi:10.1117/12.2251548

20 February 2017 High-Q resonance near zero wave vector in photonic crystal slab for label-free sensing

Yonghao Liu, Shuling Wang, Weidong Zhou, Yuze Sun

Proceedings Volume 10108, Silicon Photonics XII; 1010810 (2017) https://doi.org/10.1117/12.2251548
Event: SPIE OPTO, 2017, San Francisco, California, United States

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.

Citation Download Citation

Yonghao Liu, Shuling Wang, Weidong Zhou, and Yuze Sun "High-Q resonance near zero wave vector in photonic crystal slab for label-free sensing", Proc. SPIE 10108, Silicon Photonics XII, 1010810 (20 February 2017); https://doi.org/10.1117/12.2251548

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