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Tamm plasmon polaritons: Slow and spatially compact light

M. É. Sasin, Ruben P. Seisyan, M. A. Kaliteevski, Stuart Brand, Richard A. Abram, John Martyn Chamberlain, Anton Yu. Egorov, Alexey P. Vasil’ev, Vladimir S. Mikhrin, Alexey Vitalievich Kavokin

📄 Abstract

We report on the first experimental observation of Tamm plasmon polaritons (TPPs) formed at the interface between a metal and a dielectric Bragg reflector (DBR). In contrast to conventional surface plasmons, TPPs have an in-plane wavevector less than the wavevector of light in vacuum, which allows for their direct optical excitation. The angular resolved reflectivity and transmission spectra of a GaAs∕AlAs DBR covered by Au films of various thicknesses show the resonances associated with the TPP at low temperatures and room temperature. The in-plane dispersion of TTPs is parabolic with an effective mass of 4×10−5 of the free electron mass.

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