Au Nanohole–Nanodisk Hybrid Array for Plasmonic Sensing. Issue 11 (2nd September 2020)

• Record Type: Journal Article
• Authors: Wi, Jung-Sub; Na, Hee-Kyung
• Is Part Of: Physica status solidi. Volume 14:Issue 11(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-09-02
• Subjects: gold -- nanodisks -- nanoholes -- plasmons -- sensors; Solid state physics -- Periodicals; 530.4105
• DOI: 10.1002/pssr.202000358
• Languages: English
• ISSNs: 1862-6254

Abstract

Abstract : 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. Abstract : A gold nanohole–nanodisk hybrid array is presented as a plasmonic sensor to monitor the change in refractive index induced by the target analytes. The extraordinary optical transmission (EOT) from the proposed nanostructure is initially not visible; however, the EOT is observed and subsequently enhanced with target analytes.