Chinese Optics Letters, 2020, 18 (5): 052401, Published Online: Apr. 29, 2020  

Wide range bilayer aluminum nanowire grating sensors with robust reflective peaks Download: 637次

Author Affiliations
1 Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2 Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, and Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China
Abstract
A grating-coupled surface plasmon resonance sensor based on bilayer aluminum nanowire arrays is fabricated by laser interference lithography. The device presents impressive reflective sharp peaks by lateral surface plasmon resonances even for aluminum thicknesses of merely several nanometers. Distinct reflective peaks and dramatic color shifts under different analytes are observed within a wide range of incident angle, metal thickness, and refractive index. The sensitivity of 307 nm per refractive index unit is experimentally obtained. The reflective-peak-type surface plasmon resonance sensors are suitable for practical applications because of easy fabrication, low cost, wide range, and high signal visibility.

Zhicheng Ye, Jun Zheng. Wide range bilayer aluminum nanowire grating sensors with robust reflective peaks[J]. Chinese Optics Letters, 2020, 18(5): 052401.

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