Nonlinear spectroscopy of exciton-polaritons in a GaAs-based microcavity
MetadataShow full item record
We present a systematic investigation of two-photon excitation processes in a GaAs-based microcavity in the strong-coupling regime. We observe second harmonic generation resonant to the upper and lower polariton level, which exhibits a strong dependence on the photonic fraction of the corresponding polariton. In addition, we have performed two-photon excitation spectroscopy to identify 2p exciton states which are crucial for the operation as a terahertz lasing device, which was suggested recently [A. V. Kavokin et al., Phys. Rev. Lett. 108, 197401 (2012)]. However, no distinct signatures of a 2p exciton state could be identified, which indicates a low two-photon pumping efficiency.
Schmutzler , J , Aßmann , M , Czerniuk , T , Kamp , M , Schneider , C , Höfling , S & Bayer , M 2014 , ' Nonlinear spectroscopy of exciton-polaritons in a GaAs-based microcavity ' Physical Review. B, Condensed matter and materials physics , vol 90 , no. 7 , 075103 . DOI: 10.1103/PhysRevB.90.075103
Physical Review. B, Condensed matter and materials physics
© 2014 American Physical Society
The Dortmund group acknowledges support from the Deutsche Forschungsgemeinschaft (Grants No. 1549/18-1 and No. 1549/19-1). M.B. acknowledges support from the Russian Ministry of Science and Education (Contract No. 14.Z50.31.0021).
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.