Density dependent coupling of negatively charged excitons with confined photons in a GaAs/AlAs microcavity

Citation
R. Rapaport et al., Density dependent coupling of negatively charged excitons with confined photons in a GaAs/AlAs microcavity, PHYS ST S-A, 178(1), 2000, pp. 481-487
Citations number
11
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
481 - 487
Database
ISI
SICI code
0031-8965(200003)178:1<481:DDCONC>2.0.ZU;2-X
Abstract
The negatively charged exciton (X-) is observed to strongly couple with the microcavity (MC)-confined photons in a GaAs quantum well containing a two- dimensional electron gas with 0 < n(e) < 3 x 10(10) cm(-2). This strong cou pling results in the formation of charged polaritons. The coupling strength is found to depend on root n(c), in analogy to two-level atoms in a cavity . A model is suggested to explain this dependence. The analysis of the refl ection and photoluminescence spectra shows that X- is strongly admired with the neutral exciton (X) via their coupling with the MC-photons. The linewi dth dependence on n(e) indicates that electron-polariton scattering is effe ctive.