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

被引：0
|
作者：
Liu, Yonghao [1 ]
Wang, Shuling [1 ]
Zhou, Weidong [1 ]
Sun, Yuze [1 ]
机构：
[1] Univ Texas Arlington, Dept Elect Engn, Arlington, TX 76019 USA
来源：
SILICON PHOTONICS XII | 2017年 / 10108卷
基金：
美国国家科学基金会;
关键词：
Fano resonance; guided resonance; photonic crystal slab; refractive index sensor; OPTICAL BIOSENSOR; FANO RESONANCE; ABSORPTION; MODES;
D O I：
10.1117/12.2251548
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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 = 3.2x10(4) was measured with high extinction ratio (ER > 10 dB) for the PCS in air. Q = 1.8x10(4) 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.
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页数：7
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