Effect of dielectric medium anisotropy on the polarization degree of emission from a single quantum dash
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Excitonic emission from single InAs/InGaAlAs/InP quantum dashes has been investigated in the context of degree of linear polarization by post-growth modification of its surrounding dielectric medium. We present optical spectroscopy measurements on a symmetric squared pedestal structures (mesas), and asymmetric rectangular ones oriented parallel or perpendicular to the main in-plane axis of the dashes [1-10]. Polarization resolved microphotoluminescence shows a significant quantitative modification of the degree of linear polarization value from -20% up to 70%. These results have been confronted with calculations of the coupling between the exciton transition dipole moment and electromagnetic field distributed in the vicinity of a quantum dash inside a processed mesa.
Mrowinski , P , Tarnowski , K , Olszewski , J , Somers , A , Kamp , M , Höfling , S , Reithmaier , J P , Urbanczyk , W , Misiewicz , J , Machnikowski , P & Sek , G 2016 , Effect of dielectric medium anisotropy on the polarization degree of emission from a single quantum dash . in Acta Physica Polonica A : Proceedings of the 44th International School and Conference on the Physics of Semiconductors "Jaszowiec 2015", Wisła, Poland, June 20-25, 2015 . vol. 129 , Institute of Physics, Polish Academy of Sciences , pp. A48-A52 , 44th Jaszowiec International School and Conference on the Physics of Semiconductors (IS and CPS) , Poland , 20/06/15 . https://doi.org/10.12693/APhysPolA.129.A-48conference
Acta Physica Polonica A
© 2016, Institute of Physics, Polish Academy of Science. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at przyrbwn.icm.edu.pl / https://dx.doi.org/10.12693/APhysPolA.129.A-48