Surface-Enhanced Nonlinear Four-Wave Mixing
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- 29 January 2010
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 104 (4), 046803
- https://doi.org/10.1103/physrevlett.104.046803
Abstract
We report on a particularly strong third-order nonlinear response from nanostructured gold surfaces. Two incident laser beams with frequencies and give rise to four-wave mixing (4WM) fields with frequencies and . We demonstrate that the nonlinear response can be purely evanescent and that nanostructured surfaces convert the evanescent energy into propagating radiation, thereby increasing the efficiency of frequency conversion. The emitted 4WM radiation is found to be directional, polarized, coherent, and both frequency and angle tunable. The ability to perform efficient frequency conversion in reduced dimensions provides new opportunities for nanophotonics and active plasmonics. DOI: http://dx.doi.org/10.1103/PhysRevLett.104.046803 © 2010 The American Physical Society
Keywords
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