The optical response of the intersubband excitation of multiple InAs/AlSb quantum wells embedded in a planar semiconductor microcavity has been studied through angle-dependent reflectance measurements. Using a resonator based on total internal reflection, a strong coupling is demonstrated between the intersubband optical transition and the cavity photon, with the attendant formation of intersubband polaritons. A giant vacuum-Rabi splitting 2 Omega(R) was observed both at liquid helium temperatures (2 Omega(R) = 33 meV) as well as at 300 K (2 Omega(R) = 32 meV), for a transition energy (omega(12) = 123 meV. The observed ratio Omega(r)/omega(12) is a record high value (14%) for any strongly-coupled systems, and demonstrates the huge potential of this material for the achievement of the ultra-strong coupling regime predicted theoretically. ((c)) 2007 Elsevier Ltd. All rights reserved.

Giant intersubband polariton splitting in InAs/AlSb microcavities

TREDICUCCI, ALESSANDRO;
2007

Abstract

The optical response of the intersubband excitation of multiple InAs/AlSb quantum wells embedded in a planar semiconductor microcavity has been studied through angle-dependent reflectance measurements. Using a resonator based on total internal reflection, a strong coupling is demonstrated between the intersubband optical transition and the cavity photon, with the attendant formation of intersubband polaritons. A giant vacuum-Rabi splitting 2 Omega(R) was observed both at liquid helium temperatures (2 Omega(R) = 33 meV) as well as at 300 K (2 Omega(R) = 32 meV), for a transition energy (omega(12) = 123 meV. The observed ratio Omega(r)/omega(12) is a record high value (14%) for any strongly-coupled systems, and demonstrates the huge potential of this material for the achievement of the ultra-strong coupling regime predicted theoretically. ((c)) 2007 Elsevier Ltd. All rights reserved.
Anappara, Aa; Barate, D; Tredicucci, Alessandro; Devenson, J; Teissier, R; Baranov, A.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/495214
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 7
social impact