Refractive Index Sensor Using Long-Range Surface Plasmon Resonance with Prism Coupler

被引：39
|
作者：
Paliwal, Ayushi [1 ]
Tomar, Monika [2 ]
Gupta, Vinay [1 ]
机构：
[1] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India
[2] Univ Delhi, Dept Phys, Miranda House, Delhi 110007, India
来源：
PLASMONICS | 2019年 / 14卷 / 02期
关键词：
Resonance; Plasmon; Long-range surface plasmon; Refractive index; THIN-FILMS;
D O I：
10.1007/s11468-018-0814-3
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Long-range surface plasmon resonance (LRSPR)-based sensors exhibit high sensitivity as compared to the conventional SPR sensors due to low losses. A high refractive index prism and low refractive index dielectrics are required to excite long-range surface plasmon (LRSP) mode. In this work, a symmetrical structure consisting of metal (Au) layer sandwiched between the two similar refractive index dielectrics has been utilized to excite LRSPR modes. Two dielectrics, i.e., LiF and MgF2 thin films have been chosen for glucose sensing. Theoretical simulations for optimizing the thickness of two dielectrics have been carried out. Highly sensitive refractive index sensors based on LRSPR have been developed using the two dielectric thin films and their sensitivities have been compared.
引用
收藏
页码：375 / 381
页数：7
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