Journal
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
Volume 369, Issue 1950, Pages 3497-3509Publisher
ROYAL SOC
DOI: 10.1098/rsta.2011.0100
Keywords
nonlinear optics; metamaterials; nonlinear plasmonics; nanophotonics; nonlinear frequency mixing; four-wave mixing
Categories
Funding
- National Science Foundation [ECCS-0918416]
- Catalan AGAUR pivprogram
- ICREA
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [0918416] Funding Source: National Science Foundation
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We investigate the nonlinear optical response of a noble metal surface. We derive the components of the third-order nonlinear susceptibility and determine an absolute value of chi((3)) approximate to 0.2nm(2) V-2, a value that is more than two orders of magnitude larger than the values found for typical nonlinear laser crystals. Using nonlinear four-wave mixing (4WM) with incident laser pulses of frequencies omega(1) and omega(2), we generate fields oscillating at the nonlinear frequency omega(4WM) = 2 omega(1) - omega(2). We identify and discuss three distinct regimes: (i) a regime where the 4WM field is propagating, (ii) a regime where it is evanescent, and (iii) a regime where the nonlinear response couples to surface plasmon polaritons.
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