Electroluminescence emission from polariton states in GaAs-based semiconductor microcavities

Details Electroluminescence emission from polariton states in GaAs-based semiconductor microcavities Electroluminescence emission from polariton states in GaAs-based semiconductor microcavities

2008-01-23

arxiv.org/abs/0801.3536v1

Physics

Condensed Matter

Other Condensed Matter

13 pages, 3 figures

Scientific paper

10.1063/1.2844860

The authors report the observation of electroluminescence from GaAs-based semiconductor microcavities in the strong coupling regime. At low current densities the emission consists of two peaks, which exhibit anti-crossing behaviour as a function of detection angle and thus originate from polariton states. With increasing carrier injection we observe a progressive transition from strong to weak coupling due to screening of the exciton resonance by free carriers. The demonstration that polariton emission can be excited by electrical injection is encouraging for future development of polariton lasers.

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