TY - JOUR
T1 - Demonstration of versatile whispering-gallery micro-lasers for remote refractive index sensing
AU - Wan, Lei
AU - Chandrahalim, Hengky
AU - Zhou, Jian
AU - Li, Zhaohui
AU - Chen, Cong
AU - Cho, Sangha
AU - Zhang, Hui
AU - Mei, Ting
AU - Tian, Huiping
AU - Oki, Yuji
AU - Nishimura, Naoya
AU - Fan, Xudong
AU - Jay Guo, L.
N1 - Funding Information:
National Science Foundation (NSF) (DBI-1451127, CMMI-1727918); National Natural Science Foundation of China (NSFC) (61435006, 61525502, 61705046); Research fund for the Science and Technology Planning Project of Guangdong Province (2017B010123005); Postdoctoral Scientific Foundation of China (2017M6121608). The authors gratefully thank Q. Y. Cui from the Michigan of University for experimental assistance. We would also like to acknowledge the technical support from Lurie Nanofabrication Facility (LNF) at the University of Michigan.
Publisher Copyright:
© 2018 Optical Society of America.
PY - 2018/3/5
Y1 - 2018/3/5
N2 - We developed chip-scale remote refractive index sensors based on Rhodamine 6G (R6G)-doped polymer micro-ring lasers. The chemical, temperature, and mechanical sturdiness of the fused-silica host guaranteed a flexible deployment of dye-doped polymers for refractive index sensing. The introduction of the dye as gain medium demonstrated the feasibility of remote sensing based on the free-space optics measurement setup. Compared to the R6G-doped TZ-001, the lasing behavior of R6G-doped SU-8 polymer micro-ring laser under an aqueous environment had a narrower spectrum linewidth, producing the minimum detectable refractive index change of 4 × 10−4 RIU. The maximum bulk refractive index sensitivity (BRIS) of 75 nm/RIU was obtained for SU-8 laser-based refractive index sensors. The economical, rapid, and simple realization of polymeric micro-scale whispering-gallery-mode (WGM) laser-based refractive index sensors will further expand pathways of static and dynamic remote environmental, chemical, biological, and bio-chemical sensing.
AB - We developed chip-scale remote refractive index sensors based on Rhodamine 6G (R6G)-doped polymer micro-ring lasers. The chemical, temperature, and mechanical sturdiness of the fused-silica host guaranteed a flexible deployment of dye-doped polymers for refractive index sensing. The introduction of the dye as gain medium demonstrated the feasibility of remote sensing based on the free-space optics measurement setup. Compared to the R6G-doped TZ-001, the lasing behavior of R6G-doped SU-8 polymer micro-ring laser under an aqueous environment had a narrower spectrum linewidth, producing the minimum detectable refractive index change of 4 × 10−4 RIU. The maximum bulk refractive index sensitivity (BRIS) of 75 nm/RIU was obtained for SU-8 laser-based refractive index sensors. The economical, rapid, and simple realization of polymeric micro-scale whispering-gallery-mode (WGM) laser-based refractive index sensors will further expand pathways of static and dynamic remote environmental, chemical, biological, and bio-chemical sensing.
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U2 - 10.1364/OE.26.005800
DO - 10.1364/OE.26.005800
M3 - Article
C2 - 29529781
AN - SCOPUS:85042884459
SN - 1094-4087
VL - 26
SP - 5800
EP - 5809
JO - Optics Express
JF - Optics Express
IS - 5
ER -