Suspended membrane GaN gratings for refractive index sensing
Suspended membrane GaN gratings for refractive index sensing
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用于折射率传感的悬浮膜 GaN 光栅
DOI:
10.7567/apex.7.052201
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发表时间:
2014-05
影响因子:
2.3
通讯作者:
Zhu, Hongbo
中科院分区:
文献类型:
--
作者:
Chen, Jiajia;Shi, Zheng;He, Shumin;Garcia, Martin Lopez;Chen, Lifeng;Hueting, Nikolai A.;Cryan, Martin;Zhang, Miao;Zhu, Hongbo
In this paper, we describe the fabrication and the novel procedure for back thinning the GaN layer, which leads to improved optical performance. Angular-resolved reflectance measurements are then conducted to characterize the GaN gratings and show the dependence of resonant wavelength on grating period and membrane thickness. The measured results compare well with electromagnetic modeling based on rigorous coupled wave analysis (RCWA). Altering the dielectric environment has been shown as a novel sensing mechanism, and this work opens the way to the fabrication of novel GaN resonant photonic devices for refractive index sensing applications in the visible wavelength range.
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