標題: The aspect ratio effect on plasmonic properties and biosensing of bonding mode in gold elliptical nanoring arrays
作者: Tsai, Chia-Yang
Chang, Kai-Hao
Wu, Che-Yao
Lee, Po-Tsung
光電工程學系
Department of Photonics
公開日期: 17-Jun-2013
摘要: We investigate both numerically and experimentally the optical properties and biosensing of gold elliptical nanoring (ENR) arrays with various aspect ratios. The gold ENR exhibits a strong localized surface plasmon bonding mode in near-infrared region, whose peak wavelength is red-shifted as increasing the aspect ratio under longitudinal and transverse polarizations. Furthermore, the disk- and hole-like optical properties for longitudinal and transverse modes are observed, which cause different behaviors in field intensity enhancement. For biomolecule sensing, we find that both modes show increased surface sensitivities when enlarging the aspect ratio of gold ENR. (C) 2013 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.21.014090
http://hdl.handle.net/11536/22293
ISSN: 1094-4087
DOI: 10.1364/OE.21.014090
期刊: OPTICS EXPRESS
Volume: 21
Issue: 12
起始頁: 14090
結束頁: 14096
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