Forming ITO/Ag hole-array/ITO multilayers for near infrared transparent conducting electrodes and filters

Hyeong Seop Im, Daihong Huh, Heon Lee, Su Kyung Kim, Tae Yeon Seong

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)Q189-Q193
JournalECS Journal of Solid State Science and Technology
Volume8
Issue number10
DOIs
Publication statusPublished - 2019 Jan 1

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Multilayers
Electric properties
Infrared radiation
Electrodes
Surface plasmon resonance
Optical devices
Wavelength

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Forming ITO/Ag hole-array/ITO multilayers for near infrared transparent conducting electrodes and filters. / Im, Hyeong Seop; Huh, Daihong; Lee, Heon; Kim, Su Kyung; Seong, Tae Yeon.

In: ECS Journal of Solid State Science and Technology, Vol. 8, No. 10, 01.01.2019, p. Q189-Q193.

Research output: Contribution to journalArticle

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