SPR Sensor Based on Exposed-Core Grapefruit Fiber With Bimetallic Structure
| Autor: | Ying Lu, Xianchao Yang, Jianquan Yao, Mintuo Wang |
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| Rok vydání: | 2016 |
| Předmět: |
Analyte
Birefringence Materials science business.industry 02 engineering and technology Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Core (optical fiber) Wavelength 020210 optoelectronics & photonics Optics 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Surface plasmon resonance business Refractive index Plasmon Localized surface plasmon |
| Zdroj: | IEEE Photonics Technology Letters. 28:649-652 |
| ISSN: | 1941-0174 1041-1135 |
| DOI: | 10.1109/lpt.2015.2503801 |
| Popis: | A liquid refractive index (RI) sensor based on an exposed-core grapefruit fiber with a bimetallic structure and a central air hole using surface plasmon resonance (SPR) is presented. The asymmetrically SPR region leading to strong birefringence with $x$ -polarized peak provides much higher peak loss and sensitivity than $y$ -polarized. To match with the plasmon and enhance the mode coupling, we introduce a central air hole to lower the effective RI of the core guided mode. We numerically investigate the effects of the central air hole size, silver layer and gold layer thicknesses on the sensor’s performance using wavelength, and amplitude interrogations. A large analyte RI range from 1.33 to 1.42 is evaluated, and the results show that the sensor has a higher sensitivity for high analyte RI change than the low. The extremely high wavelength sensitivity 16 400 nm/RIU at 1.42 is obtained. This letter can provide a reference for developing a high sensitivity, real-time, and distributed SPR sensor. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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