New insight to the diffraction at high reflecting gratings under surface polariton excitation conditions

Alexandre V. Kats

doi:10.1117/12.451488

26 December 2001 New insight to the diffraction at high reflecting gratings under surface polariton excitation conditions

Alexandre V. Kats

Author Affiliations +

Proceedings Volume 4438, Physics, Theory, and Applications of Periodic Structures in Optics; (2001) https://doi.org/10.1117/12.451488
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

An overview of results concerning diffraction by periodic structures under conditions of surface plasmon polaritons excitation is presented. The possibility of the detailed analytical investigation of the problem is based upon the restriction for the case of weak scattering. In spite of this restriction, it is shown that resonance may be strong. The simple analytical approach based upon the modified perturbation theory allows presenting results in explicit analytical form. We consider both the in-plane diffraction (i.e., the wavevector of the periodic structure is parallel to the plane of incidence) and diffraction in general geometry (conical mounting). The systematization of the resonances is presented for diffraction from the grating on the surface of high reflecting media. It is shown that the behavior of the complex amplitudes of all diffracted waves in the resonance vicinity possesses universality, namely, the results may be presented in a scaled form and thus are self-similar. The difference between various media consists in the resonance position and scaling factors. For the conical mounting, the dependence of the diffracted wave intensities, amplitudes and phases on the parameters of the incident wave and media properties are investigated. The theoretical results obtained show good agreement with the experimental data. The possibilities of new experiments based on the theoretical predictions and possible generalizations are discussed.

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Alexandre V. Kats "New insight to the diffraction at high reflecting gratings under surface polariton excitation conditions", Proc. SPIE 4438, Physics, Theory, and Applications of Periodic Structures in Optics, (26 December 2001); https://doi.org/10.1117/12.451488

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