Enhanced sensitivity in injection-molded guided-mode-resonance sensors via low-index cavity layers

被引：36

作者：

Ku, Yi-Fan ^{[1
,2
]}

Li, Hsun-Yuan ^{[1
,2
]}

Hsieh, Wen-Hsin ^{[1
,2
]}

Chau, Lai-Kwan ^{[3
,4
]}

Chang, Guo-En ^{[1
,2
]}

机构：

[1] Natl Chung Cheng Univ, Dept Mech Engn, Minhsiung Township 62102, Chia Yi County, Taiwan

[2] Natl Chung Cheng Univ, Adv Inst Mfg High Tech Innovat, Minhsiung Township 62102, Chia Yi County, Taiwan

[3] Natl Chung Cheng Univ, Dept Chem & Biochem, Minhsiung Township 62102, Chia Yi County, Taiwan

[4] Natl Chung Cheng Univ, Ctr Nano Biodetect, Minhsiung Township 62102, Chia Yi County, Taiwan

来源：

OPTICS EXPRESS | 2015年 / 23卷 / 11期

关键词：

LABEL-FREE DETECTION; WAVE-GUIDE; PHOTONIC CRYSTALS; LOW-COST; BIOSENSOR; COUPLER; IMMUNOSENSOR;

D O I：

10.1364/OE.23.014850

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present an investigation on the use of low-index cavity layers to enhance the sensitivity of injection-molded guided-mode resonance (GMR) sensors. By adjusting the sputtering parameters, a low-index cavity layer is created at the interface between the waveguide layer and the substrate. Refractive index measurements show that a sensitivity enhancement of up to 220% is achieved with a cavity layer, in comparison to a reference GMR sensor without a cavity layer. Finite-element-method simulations were performed, and the results indicate that the cavities significantly redistribute the resonance mode profile and thus enhances the sensitivity. The present investigation demonstrates a new method for enhancing the sensitivity of injection-molded GMR sensors for high-sensitivity label-free biosensing. (C) 2015 Optical Society of America

引用

页码：14850 / 14859

页数：10

共 28 条

[1] Photonic crystal optical biosensor incorporating structured low-index porous dielectric [J].