Enhanced optical pump-terahertz probe nonlinearity by nano antenna patterning

S. B. Choi; J. S. Kyoung; M. A. Seo; H. S. Kim; H. R. Park; Bong-Jun Kim; Hyun-Tak Kim; K. J. Ahn; D. S. Kim

Proceedings of the International Quantum Electronics Conference and Conference on Lasers and Electro-Optics Pacific Rim 2011
(Optica Publishing Group, 2011),
paper C627

Enhanced optical pump-terahertz probe nonlinearity by nano antenna patterning

S. B. Choi, J. S. Kyoung, M. A. Seo, H. S. Kim, H. R. Park, Bong-Jun Kim, Hyun-Tak Kim, K. J. Ahn, and D. S. Kim

Conference on Lasers and Electro-Optics/Pacific Rim 2011

Sydney Australia
28 August–1 September 2011
ISBN: 978-0-9775657-7-1

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Session 5: Symposium 3 - THz Sources (THzS)

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S. B. Choi, J. S. Kyoung, M. A. Seo, H. S. Kim, H. R. Park, B. Kim, H. Kim, K. J. Ahn, and D. S. Kim, "Enhanced optical pump-terahertz probe nonlinearity by nano antenna patterning," in Proceedings of the International Quantum Electronics Conference and Conference on Lasers and Electro-Optics Pacific Rim 2011, (Optica Publishing Group, 2011), paper C627.

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Abstract

We demonstrate that nanoresonators on a vanadium dioxide (VO₂) thin film help amplify the available optical pump- terahertz probe transmission nonlinearity when the VO₂ film undergoes insulator – metal phase transition. By virtue of subpicosecond time scale of VO₂ phase transition, dramatically enhanced ultrafast control of THz transmission is enabled by moderate optical pump. This is compared to bare VO₂ films where no switching dynamics are observed under similar conditions.

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