Coherent terahertz radiation from cavity polaritons in GaAs/AlGaAs microcavities

Authors
Harel, R Brener, I Pfeiffer, LN West, KW Vandenberg, JM Chu, SG Wynn, JD
Citation
R. Harel et al., Coherent terahertz radiation from cavity polaritons in GaAs/AlGaAs microcavities, PHYS ST S-A, 178(1), 2000, pp. 365-372
Citations number
17
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH
ISSN journal
00318965 → ACNP
Volume
178
Issue
1
Year of publication
2000
Pages
365 - 372
Database
ISI
SICI code
0031-8965(200003)178:1<365:CTRFCP>2.0.ZU;2-A
Abstract
We report on the first observation of coherent terahertz (THz) electromagne tic radiation emitted from an unbiased semiconductor microcavity (MC) at lo w temperature. The THz radiation is emitted after resonant optical excitati on of the two cavity polariton modes and its frequency is in excellent agre ement with the vacuum Rabi splitting (VRS) frequency. We attribute the THz radiation to oscillations between the MC and the exciton modes with a frequ ency equal to the VRS, resulting in a radiating oscillating dipole.