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Dynamically tunable perfect absorbers based on periodic microstructures
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Paper Abstract

Arising from condensed-matter excitations, epsilon-near-zero (ENZ) modes are a new path for enhancing light-matter interactions at nanoscale with their unique and interesting optical properties when probed at wavelengths corresponding to their zero permittivity crossing points. In this work, a highly efficient tunable absorber can be achieved by integrating an ultra-thin indium tin oxide (ITO) film into the periodically patterned metal-insulator-metal (MIM) structure. Particularly strong absorption modulation could be achieved when the ITO is operated in the ENZ spectral range. This work can make a significant contribution to direct application in a range of optoelectronic devices that require active control over light absorption and energy conversion.

Paper Details

Date Published: 18 November 2019
PDF: 6 pages
Proc. SPIE 11194, Plasmonics IV, 111940R (18 November 2019); doi: 10.1117/12.2537790
Show Author Affiliations
Peng Zhou, Nanjing Univ. of Information Science & Technology (China)
Gaige Zheng, Nanjing Univ. of Information Science & Technology (China)
Xiujuan Zou, Nanjing Univ. (China)


Published in SPIE Proceedings Vol. 11194:
Plasmonics IV
Hongxing Xu; Satoshi Kawata; Min Qiu, Editor(s)

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