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Proceedings Paper

Strong THz to IR thermal radiation from random metallic nanostructures by femtosecond laser excitation
Author(s): Liangliang Zhang; Kaijun Mu; Ji Zhao; Tong Wu; Hai Wang; Cunlin Zhang
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Paper Abstract

We report intense (~10 mW), ultra-broadband (~150 THz wide), terahertz-to-infrared, Gaussian-wavefront emission from nanopore-structured metallic thin films under femtosecond laser pulse irradiation. The proposed underlying mechanism is thermal radiation. The nanostructures of the metal film are produced by random holes in the substrate. Under pulse-train femtosecond laser irradiation, we found dramatically enhanced optical absorption, with an absorptivity that was equal to as much as 95% of the metallic surface nanostructure, due to both an antireflection mechanism and dissipation of excited surface plasmon polaritons into the metal surface.

Paper Details

Date Published: 12 August 2015
PDF: 12 pages
Proc. SPIE 9625, 2015 International Conference on Optical Instruments and Technology: Terahertz Technologies and Applications, 962509 (12 August 2015); doi: 10.1117/12.2192952
Show Author Affiliations
Liangliang Zhang, Capital Normal Univ. (China)
Kaijun Mu, Capital Normal Univ. (China)
Ji Zhao, Beijing Institute of Technology Univ. (China)
Tong Wu, Capital Normal Univ. (China)
Hai Wang, Capital Normal Univ. (China)
Cunlin Zhang, Capital Normal Univ. (China)


Published in SPIE Proceedings Vol. 9625:
2015 International Conference on Optical Instruments and Technology: Terahertz Technologies and Applications
Cunlin Zhang; Xi-Cheng Zhang, Editor(s)

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