✦ LIBER ✦

Coherent Terahertz Radiation from Cavity Polaritons in GaAs/AlGaAs Microcavities

✍ Scribed by Harel, R. ;Brener, I. ;Pfeiffer, L.N. ;West, K.W. ;Vandenberg, J.M. ;Chu, S.G. ;Wynn, J.D.

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 227 KB
Volume: 178
Category: Article
ISSN: 0031-8965
DOI: 10.1002/1521-396x(200003)178:1<365::aid-pssa365>3.0.co;2-i

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✦ Synopsis

We report on the first observation of coherent terahertz (THz) electromagnetic radiation emitted from an unbiased semiconductor microcavity (MC) at low temperature. The THz radiation is emitted after resonant optical excitation of the two cavity polariton modes and its frequency is in excellent agreement with the vacuum Rabi splitting (VRS) frequency. We attribute the THz radiation to oscillations between the MC and the exciton modes with a frequency equal to the VRS, resulting in a radiating oscillating dipole.