Electromagnetic wave funneling through nano-gaps and nano-antennas

D. S. Kim; M. A. Seo; H. R. Park; J. S. Kyoung; J. W. Lee; O. K. Suwal; S. S. Choi

doi:10.1117/12.808857

6 February 2009 Electromagnetic wave funneling through nano-gaps and nano-antennas

D. S. Kim, M. A. Seo, H. R. Park, J. S. Kyoung, J. W. Lee, O. K. Suwal, S. S. Choi

Author Affiliations +

Proceedings Volume 7214, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIII; 72140H (2009) https://doi.org/10.1117/12.808857
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

We show that accumulation of charges at the metal edges via light-induced currents creates large horizontal electric field, which in effect attracts the incoming light. The enhanced field is fully propagating towards the far-field because no cut-off exists. With the amplitude enhancement in the range of 1,000, the intensity enhancement of 10⁶, and the nonlinear enhancement of 10¹², this structure can be an excellent launching pad for inducing broad-band nonlinearity, small signal detection in astronomy or biology, and for surface enhanced Raman scattering.

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D. S. Kim, M. A. Seo, H. R. Park, J. S. Kyoung, J. W. Lee, O. K. Suwal, and S. S. Choi "Electromagnetic wave funneling through nano-gaps and nano-antennas", Proc. SPIE 7214, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIII, 72140H (6 February 2009); https://doi.org/10.1117/12.808857

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