Forming ITO/Ag Hole-Array/ITO Multilayers for Near Infrared Transparent Conducting Electrodes and Filters. (23rd September 2019)

• Record Type: Journal Article
• Authors: Im, Hyeong-Seop; Huh, Daihong; Lee, Heon; Kim, Su-Kyung; Seong, Tae-Yeon
• Is Part Of: ECS journal of solid state science and technology. Volume 8:Number 10(2019)
• Page Start: Q189
• Page End: Q193
• Publication Date: 2019-09-23
• Subjects: Films -- Nanohole array -- Plasmonic nanostructure -- Surface plasmon polariton; Solid state chemistry -- Periodicals; Electronics -- Materials -- Periodicals; Electrochemistry -- Periodicals; 541.0421
• DOI: 10.1149/2.0081910jss
• Languages: English
• ISSNs: 2162-8777

Abstract

Abstract : Ag hole-array samples (400 and 500 nm in period) were used to realize near infrared (NIR) transparent electrodes and filters for NIR optical devices. The opto-electrical properties of the ITO/Ag hole-array/ITO multilayer (ITO/hole/ITO sample) were investigated as functions of the hole period and ITO layer thickness. For comparison, the opto-electrical properties of ITO and ITO/Ag film/ITO samples were also examined. The ITO/hole/ITO sample exhibited characteristic features: (i) The hole-array samples revealed small dips below 775 nm and large minima in the 800 – 1200 nm wavelength region, above which the transmittance reached global maxima; ii) The overall transmittances were red-shifted with the hole period and ITO thickness. The transmittance of the ITO/hole/ITO sample (300 nm in diameter), ITO/Ag film/ITO, and ITO samples was shown to be 83.0%, 16.8% and 96.4% at 1421nm, respectively. The 10 nm and 70 nm-thick ITO multilayer samples had maximum transmittances of 82.1% at 1, 082 nm and 80.4% at 1337 nm, respectively. Finite-difference time-domain (FDTD) simulations were performed to describe the transmittance behavior. On the basis of the FDTD simulations, the transmittance minima and enhanced transmittance of the ITO/hole/ITO samples are ascribed to surface plasmon polariton (SPP) resonance effect.