Tunable terahertz plasmonic filter based on a substrate of photo-induced phase-transition vanadium dioxide film

Jie Dong; Yanfeng Li; Liwei Chen; Chongling Sun; Lu Chai; Chingyue Wang

doi:10.1117/12.2065094

21 August 2014 Tunable terahertz plasmonic filter based on a substrate of photo-induced phase-transition vanadium dioxide film

Jie Dong, Yanfeng Li, Liwei Chen, Chongling Sun, Lu Chai, Chingyue Wang

Author Affiliations +

Proceedings Volume 9233, International Symposium on Photonics and Optoelectronics 2014; 92330Q (2014) https://doi.org/10.1117/12.2065094
Event: International Symposium on Photonics and Optoelectronics (SOPO 2014), 2014, Suzhou, China

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.

Citation Download Citation

Jie Dong, Yanfeng Li, Liwei Chen, Chongling Sun, Lu Chai, and Chingyue Wang "Tunable terahertz plasmonic filter based on a substrate of photo-induced phase-transition vanadium dioxide film", Proc. SPIE 9233, International Symposium on Photonics and Optoelectronics 2014, 92330Q (21 August 2014); https://doi.org/10.1117/12.2065094

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