Single-slot hybrid microring resonator hydrogen sensor

被引:18
|
作者
Cicek, Kenan [1 ,2 ,4 ]
Eryurek, Mustafa [2 ]
Kiraz, Alper [2 ,3 ]
机构
[1] Igdr Univ, Dept Elect & Elect Engn, Igdr, Turkey
[2] Koc Univ, Dept Phys, TR-34450 Istanbul, Turkey
[3] Koc Univ, Dept Elect & Elect Engn, TR-34450 Istanbul, Turkey
[4] Univ Bristol, Merchant Venturers Sch Engn, Dept Elect & Elect Engn, Bristol, Avon, England
关键词
OPTICAL-PROPERTIES; GAS SENSORS; PALLADIUM; FILMS;
D O I
10.1364/JOSAB.34.001465
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Photonic integrated circuits fabricated on silicon-on-insulator platforms offer convenient foundations to implement highly sensitive, compact, robust, and low-cost technology in sensing applications. The potential of this technology in hydrogen gas sensing is discussed in this study. A single-slot hybrid microring-resonator-(MRR) based hydrogen gas sensor utilizing a coaxial palladium (Pd) microdisk is demonstrated. Detection is based on expansion of Pd upon hydrogen exposure toward the slot between the outer radius of the Pd microdisk and the inner radius of the MRR and the subsequent shift of the whispering gallery modes (WGMs) propagating in the MRR. Finite-difference time-domain simulations indicate a sensitivity as high as 11.038 nm/% hydrogen, provided that optimum geometrical design parameters are chosen. This sensitivity value is similar to 23 times higher than other existing WGM-based hydrogen sensor demonstrations. (C) 2017 Optical Society of America
引用
收藏
页码:1465 / 1470
页数:6
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