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

Journal Article · Mon Oct 15 00:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.043807· OSTI ID:21020802

Wouters, Michiel ^[1]; Carusotto, Iacopo ^[1]

---

1. BEC-CNR-INFM and Dipartimento di Fisica, Universita di Trento, I-38050 Povo (Italy)

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.

• OSTI ID: 21020802
• Journal Information: Physical Review. A, Vol. 76, Issue 4; Other Information: DOI: 10.1103/PhysRevA.76.043807; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
EXCITATION
EXCITONS
LASERS
PARAMETRIC OSCILLATORS
PHOTONS
QUANTUM WELLS
ROTATION
SEMICONDUCTOR MATERIALS
SPECTRA
SYMMETRY BREAKING
TRANSMISSION
U-1 GROUPS