Transparent conducting oxides for active hybrid metamaterial devices

Abb, Martina, Sepúlveda, Borja, Chong, Harold M.H. and Muskens, Otto L. (2012) Transparent conducting oxides for active hybrid metamaterial devices. Journal of Optics, 14 (11), [114007]. (doi:10.1088/2040-8978/14/11/114007).

Record type: Article

Abstract

We present here a study of the combined nonlinear response of plasmonic antenna—transparent conducting oxide hybrids for activation of metamaterial devices. Nanoantenna layers consisting of randomly positioned gold nanodisk dimers are fabricated using hole-mask lithography. The nanoantenna layers are covered with a 20 nm thin layer of transparent conducting oxide (TCO). We investigate the response of atomic layer deposited aluminum-doped zinc oxide (AZO) next to indium–tin oxide (ITO) produced using sputter coating. We show that our results are in agreement with the hypothesis of fast electron-mediated cooling, facilitated by the Ohmic interface between the gold nanodisks and the TCO substrate, which appears a universal mechanism for providing a new hybrid functionality to active metamaterial devices

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