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

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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