Plasmonic behaviors of metallic AZO thin film and AZO nanodisk array

Jia Yu Lin, Kun Da Zhong, Po-Tsung Lee

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Aluminum-doped zinc oxide (AZO) is well known as transparent conducting material for electro-optical devices, but is rarely used as plasmonic material, particularly on the localized surface plasmon resonance (LSPR) behavior of AZO nanostructure and its plasmonic devices. In this study, we systematically investigate the plasmonic behaviors of AZO thin films and patterned AZO nanostructures with various structural dimensions under different annealing treatments. We find that AZO film can possess highly-tunable, metal-like, and low-loss plasmonic property and the LSPR characteristic of AZO nanostructure is observed in the near-infrared (NIR) region under proper annealing conditions. Finally, environmental index sensing is performed to demonstrate the capability of AZO nanostructure for optical sensing application. High index sensitivity of 873 nm per refractive index unit (RIU) variation is obtained in experiment.

Original languageEnglish
Pages (from-to)5125-5135
Number of pages11
JournalOptics Express
Volume24
Issue number5
DOIs
StatePublished - 7 Mar 2016

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