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Proceedings Paper

Through the (conducting) looking-glass: transparent conducting oxides for nanophotonic applications (Conference Presentation)
Author(s): Alexandra Boltasseva; Clayton DeVault; Vincenzo Bruno; Soham Saha; Zhaxylyk Kudyshev; Aveek Dutta; Stefano Vezzoli; Marcello Ferrera; Daniele Faccio; Vladimir M. Shalaev

Paper Abstract

Transparent Conducting Oxide (TCO) materials are degenerately-doped, wide-bandgap semiconductors which exhibit simultaneous high-conductivity and visible transparency. These unique properties are well known and frequently exploited for technologies such as touch-screen devices. In recent years, TCOs have been recognized as a promising material platform for nanophotonic devices, namely because of their simple, compatible fabrication, low-losses, dynamic modulation, and novel low-index properties. In this talk, I will highlight recent progress in the field of TCO-based nanophotonics, share our ongoing results and observations, and discuss future research challenges and directions. In particular, I will discuss our progress in developing metal-dielectric hybrid metasurfaces which incorporate TCOs for all-optical, ultrafast switching. Here, we incorporate defect-rich zinc oxide with a refractory titanium nitride metasurface for efficient light modulation at near-terahertz switching frequencies. My talk will also focus on TCO films for studying and observing low-index phenomena. Our recent work with aluminum-doped zinc oxide films demonstrates the ability for low-index materials to both enhance negative refraction and engender strongly coupled plasmonic systems with large room-temperature Rabi frequencies. Our work signifies the strong potential for incorporating transparent conducting oxides into plasmonic and nanophotonic devices to provide advances toward practical technologies and depth in scientific understanding.

Paper Details

Date Published: 8 March 2019
Proc. SPIE 10919, Oxide-based Materials and Devices X, 109191T (8 March 2019); doi: 10.1117/12.2512275
Show Author Affiliations
Alexandra Boltasseva, Purdue Univ. (United States)
Clayton DeVault, Purdue Univ. (United States)
Vincenzo Bruno, Univ. of Glasgow (United Kingdom)
Heriot-Watt Univ. (United Kingdom)
Soham Saha, Purdue Univ. (United States)
Zhaxylyk Kudyshev, Purdue Univ. (United States)
Aveek Dutta, Purdue Univ. (United States)
Stefano Vezzoli, Heriot-Watt Univ. (United Kingdom)
Marcello Ferrera, Heriot-Watt Univ. (United Kingdom)
Daniele Faccio, Univ. of Glasgow (United Kingdom)
Heriot-Watt Univ. (United Kingdom)
Vladimir M. Shalaev, Purdue Univ. (United States)

Published in SPIE Proceedings Vol. 10919:
Oxide-based Materials and Devices X
David J. Rogers; David C. Look; Ferechteh H. Teherani, Editor(s)

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