Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 53, Issue 36, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/ab91ed
Keywords
perovskite transparent conducting oxides; BaSnO3; infrared plasmonics; permittivity; epsilon-near-zero
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Funding
- Office of Naval Research (ONR) through the Naval Research Laboratory Basic Research Program
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We report tunable permittivity of La-doped BaSnO3 (LBSO) epitaxial films in the near- and mid-infrared range. The structural, electrical transport, and optical properties of the LBSO thin films can be effectively modified by controlling oxygen concentration during film growth. The permittivity of the LBSO films can be modified as a function of the oxygen pressure and temperature during deposition, which allows the tuning of their epsilon-near-zero wavelength from 2 mu m to 5.6 mu m. The ability to tune the permittivity in this infrared range enables the use of LBSO films as active components in infrared plasmonic devices.
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