Optical Bistability in Nonlinear Surface-Plasmon Polaritonic Crystals

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G. A. Wurtz, R. Pollard, and A. V. Zayats
School of Mathematics and Physics, The Queen's University of Belfast, Belfast, BT7 1NN, United Kingdom

Received 15 December 2005; published 4 August 2006

Nonlinearoptical transmission through periodically nanostructured metal films (surface-plasmon polaritonic crystals)has been studied. The surface polaritonic crystals have been coatedwith a nonlinear polymer. The optical transmission of such nanostructureshas been shown to depend on the control-light illumination conditions.The resonant transmission exhibits bistable behavior with the control-light intensity.The bistability is different at different resonant signal wavelengths andfor different wavelengths of the control light. The effect isexplained by the strong sensitivity of the surface-plasmon mode resonancesat the signal wavelength to the surrounding dielectric environment andthe electromagnetic field enhancement due to plasmonic excitations at thecontrolled light wavelengths.

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.97.057402
DOI:	10.1103/PhysRevLett.97.057402
PACS:	78.20.Ci; 42.65.Pc; 73.20.Mf; 78.68.+m 78.20.Ci Optical constants including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity 42.65.Pc Optical bistability, multistability, and switching, including local field effects 73.20.Mf Collective excitations (surface/interface states) including excitons, polarons, plasmons and other charge-density excitations 78.68.+m Optical properties of surfaces YEAR: 2006

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