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Mid-infrared intersubband polaritons in dispersive metal-insulator-metal resonators (Articolo in rivista)

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Mid-infrared intersubband polaritons in dispersive metal-insulator-metal resonators (Articolo in rivista) (literal)

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Alternative label

Manceau J.-M.[ 1 ]; Zanotto S.[ 2,3 ]; Ongarello T.[ 1 ] ; Sorba L.[ 2,3 ] ; Tredicucci A.[ 2,3,4 ]; Biasiol G.[ 5 ]; Colombelli R.[ 1 ] (2014)
Mid-infrared intersubband polaritons in dispersive metal-insulator-metal resonators
in Applied physics letters
(literal)

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Manceau J.-M.[ 1 ]; Zanotto S.[ 2,3 ]; Ongarello T.[ 1 ] ; Sorba L.[ 2,3 ] ; Tredicucci A.[ 2,3,4 ]; Biasiol G.[ 5 ]; Colombelli R.[ 1 ] (literal)

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[ 1 ] Univ Paris 11, UMR8622, CNRS, Inst Elect Fondamentale, F-91405 Orsay, France [ 2 ] CNR, Ist Nanosci, NEST, I-56100 Pisa, Italy [ 3 ] Scuola Normale Super Pisa, Pisa, Italy [ 4 ] Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy [ 5 ] CNR IOM, Lab TASC, I-34149 Trieste, Italy (literal)

Titolo

Mid-infrared intersubband polaritons in dispersive metal-insulator-metal resonators (literal)

Abstract

We demonstrate room-temperature strong coupling between a mid-infrared (? = 9.9 ?m) intersubband transition and the fundamental cavity mode of a metal-insulator-metal resonator. Patterning of the resonator surface enables surface-coupling of the radiation and introduces an energy dispersion which can be probed with angle-resolved reflectivity. In particular, the polaritonic dispersion presents an accessible energy minimum at k = 0 where - potentially - polaritons can accumulate. We also show that it is possible to maximize the coupling of photons into the polaritonic states and - simultaneously - to engineer the position of the minimum Rabi splitting at a desired value of the in-plane wavevector. This can be precisely accomplished via a simple post-processing technique. The results are confirmed using the temporal coupled mode theory formalism and their significance in the context of the strong critical coupling concept is highlighted. © 2014 AIP Publishing LLC. (literal)

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