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Au Nanohole–Nanodisk Hybrid Array for Plasmonic Sensing
Author(s) -
Wi Jung-Sub,
Na Hee-Kyung
Publication year - 2020
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.202000358
Subject(s) - plasmon , extraordinary optical transmission , materials science , refractive index , transmittance , optoelectronics , optics , wavelength , nanostructure , surface plasmon , metamaterial , surface plasmon polariton , nanotechnology , physics
The phenomenon of extraordinary light transmission through sub‐wavelength‐sized holes in noble metal films has attracted significant attention due to its potential applications in optical filters and plasmonic sensors. Herein, an Au nanohole–nanodisk hybrid array, which allows controllable extraordinary light transmission, is presented to detect the target analytes. A 3D electromagnetic simulation proves that the proposed plasmonic nanostructure array with its constant geometry can vary the light transmittance by altering the refractive index of the surrounding medium. As the refractive‐index‐dependent plasmon coupling between the Au nanohole and nanodisk can drastically enhance the light transmission, the Au nanohole–nanodisk hybrid array can be utilized as a sensitive and feasible plasmonic sensor.