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Title: Tunable optical performances on a periodic array of plasmonic bowtie nanoantennas with hollow cavities
Authors: Yuan-Fong Chou Chau
Chung-Ting Chou Chao
Jhin-Yu Rao
Hai-Pang Chiang
Chee Ming Lim
Ren Chong Lim
Nyuk Yoong Voo
Contributors: 國立臺灣海洋大學:光電科學研究所
Keywords: Cavity plasmon resonance
Plasmonic bowtie nanoantennas
Finite element method
Hollow number
Date: 2016
Issue Date: 2017-02-14T02:49:55Z
Publisher: Nanoscale Research Letters
Abstract: Abstract: We propose a design method to tune the near-field intensities and absorption spectra of a periodic array of plasmonic bowtie nanoantennas (PBNAs) by introducing the hollow cavities inside the metal nanostructures. The numerical method is performed by finite element method that demonstrates the engineered hollow PBNAs can tune the optical spectrum in the range of 400–3000 nm. Simulation results show the hollow number is a key factor for enhancing the cavity plasmon resonance with respect to the hotspot region in PBNAs. The design efforts primarily concentrate on shifting the operation wavelength and enhancing the local fields by manipulating the filling dielectric medium, outline film thickness, and hollow number in PBNAs. Such characteristics indicate that the proposed hollow PBNAs can be a potential candidate for plasmonic enhancers and absorbers in multifunctional opto-electronic biosensors.
Relation: 11(116)
Appears in Collections:[Institute of Optoelectronic Sciences] Periodical Articles

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