6 February 2009 Electromagnetic wave funneling through nano-gaps and nano-antennas
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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.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. S. Kim, D. S. Kim, M. A. Seo, M. A. Seo, H. R. Park, H. R. Park, J. S. Kyoung, J. S. Kyoung, J. W. Lee, J. W. Lee, O. K. Suwal, O. K. Suwal, S. S. Choi, 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); doi: 10.1117/12.808857; https://doi.org/10.1117/12.808857

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