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Effect of Dielectric Medium Anisotropy on the Polarization Degree of Emission from a Single Quantum Dash

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Mrowiński P., Tarnowski K., Olszewski J., Somers A., Kamp M., Höfling S., Reithmaier J., Urbańczyk W., Misiewicz J., Machnikowski P., Sęk G.

Acta Physica Polonica A

2016

vol. 129

issue 1a

A-48-A-52

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.

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1 Acta Physica Polonica A

1 2016

1 Höfling S.

1 Kamp M.

1 Machnikowski P.

1 Misiewicz J.

1 Mrowiński P.

1 Olszewski J.

1 Reithmaier J.

1 Somers A.

1 Sęk G.

1 Tarnowski K.

1 Urbańczyk W.

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Effect of Dielectric Medium Anisotropy on the Polarization Degree of Emission from a Single Quantum Dash