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Proceedings Paper

Tunable terahertz plasmonic filter based on a substrate of photo-induced phase-transition vanadium dioxide film
Author(s): Jie Dong; Yanfeng Li; Liwei Chen; Chongling Sun; Lu Chai; Chingyue Wang
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Paper Abstract

A tunable terahertz (THz) filter is reported, which was based on surface plasmonic effects from a subwavelength copper hole array, and the tunability was made possible by a substrate of phase-transition vanadium dioxide (VO2) film. The phase transition of the VO2 film was induced by femtosecond laser pulses and the modulation depth of the THz pulse peak by the VO2 film was measured by THz time-domain spectroscopy to be 80% under optimal fabrication conditions. The change of the conductivity of the substrate film could lead to a shift of the center resonance frequency from 1.33 to 0.92 THz, a relative shift of 30.8%. This tunable THz filter holds great promise for various applications.

Paper Details

Date Published: 21 August 2014
PDF: 6 pages
Proc. SPIE 9233, International Symposium on Photonics and Optoelectronics 2014, 92330Q (21 August 2014); doi: 10.1117/12.2065094
Show Author Affiliations
Jie Dong, Tianjin Univ. (China)
Yanfeng Li, Tianjin Univ. (China)
Liwei Chen, Tianjin Univ. (China)
Chongling Sun, Tianjin Univ. (China)
Lu Chai, Tianjin Univ. (China)
Chingyue Wang, Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 9233:
International Symposium on Photonics and Optoelectronics 2014
Zhiping Zhou, Editor(s)

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