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Intersubband polaritons are robust against inhomogeneous broadening induced by multiple quantum wells

  Articoli su Riviste JCR/ISI  (anno 2018)

Autori:  Manceau J-M.; Biasiol G.; Tran N.L.; Carusotto I.; Colombelli

Affiliazione Autori:  Univ Paris 11, CNRS UMR9001, C2N, F-91405 Orsay, France; CNR IOM, Lab TASC, Area Sci Pk,SS 14 Km 163-5 Basovizza, I-34149 Trieste, Italy; INO CNR BEC Ctr, I-38123 Povo, Italy and Univ Trento, Dipartimento Fis, I-38123 Povo, Italy.

Riassunto:  We show that intersubband (ISB) polaritons are robust to inhomogeneous broadening. In a series of multiple quantum well samples with mid-infrared ISB absorption transitions with broadenings varying by a factor of 5 (from 4 meV to 20 meV), we observed polariton linewidths lying in the 4 - 7 meV range only. We have verified the dominantly inhomogeneous origin of the broadening of the ISB transition, and that the linewidth reduction of the modes persists up to room-temperature. The immunity to inhomogeneous broadening is a direct consequence of the coupling of the large number of ISB oscillators to a single photonic mode.

Rivista/Giornale:  PROCEEDINGS OF SPIE
Volume n.:  10540      Pagine da: 105400F  a: 105400F
DOI: 10.1117/12.2289730

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