Goldstone mode of optical parametric oscillators in planar semiconductor microcavities in the strong-coupling regime

Michiel Wouters and Iacopo Carusotto
Phys. Rev. A 76, 043807 – Published 9 October 2007

Abstract

We propose an experimental setup to probe the low-lying excitation modes of a parametrically oscillating planar cavity, in particular the soft Goldstone mode which appears as a consequence of the spontaneously broken U(1) symmetry of signal-idler phase rotations. A strong and narrow peak corresponding to the Goldstone mode is identified in the transmission spectrum of a weak probe beam incident on the cavity. When the U(1) symmetry is explicitly broken by an additional laser beam pinning the signal-idler phase, a gap opens in the dispersion and the Goldstone peak is dramatically suppressed. Quantitative predictions are given for the case of semiconductor planar cavities in the strong exciton-photon coupling regime.

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  • Received 29 June 2006

DOI:https://doi.org/10.1103/PhysRevA.76.043807

©2007 American Physical Society

Authors & Affiliations

Michiel Wouters1,2 and Iacopo Carusotto1

  • 1BEC-CNR-INFM and Dipartimento di Fisica, Università di Trento, I-38050 Povo, Italy
  • 2TFVS, Universiteit Antwerpen, Universiteitsplein 1, 2610 Antwerpen, Belgium

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Issue

Vol. 76, Iss. 4 — October 2007

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