6533b7d7fe1ef96bd126791c

RESEARCH PRODUCT

Unguided plasmon-mode resonance in optically excited thin film: exact modal description of Kretschmann–Raether experiment

Damien BrissingerL. SalomonFrédérique De Fornel

subject

PhysicsPhotonbusiness.industrySurface plasmonPhysics::OpticsResonanceStatistical and Nonlinear PhysicsExtraordinary optical transmissionAtomic and Molecular Physics and OpticsOpticsNormal modeSurface waveExcited statebusinessPlasmon

description

With the aim of studying electromagnetic surface wave resonance, we rigorously solve the homogeneous and inhomogeneous problem associated with an optically excited thin metallic film. We then demonstrate unambiguously that the excited eigenmode engendering plasmonic resonance in the so-called Kretschmann–Raether configuration is an unguided mode (i.e., with an anti-evanescent structure). This result, challenging the classical interpretation of the outgoing wave condition applied to surface waves, permits a quantitative interpretation of the attenuated total reflection curves.

https://doi.org/10.1364/josab.30.000333