Unity-Order Index Change in Transparent Conducting Oxides at Visible Frequencies
- 18 May 2010
- journal article
- letter
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 10 (6), 2111-2116
- https://doi.org/10.1021/nl1006307
Abstract
We report a method for obtaining unity-order refractive index changes in the accumulation layer of a metal-oxide-semiconductor heterostructure with conducting oxide as the active material. Under applied field, carrier concentrations at the dielectric/conducting oxide interface increase from 1 × 1021/cm3 to 2.8 × 1022/cm3, resulting in a local refractive index change of 1.39 at 800 nm. When this structure is modeled as a plasmonic waveguide, the change corresponds to a modal index change of 0.08 for the plasmonic mode.Keywords
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