Details

Autor(en) / Beteiligte

• Repp, J.
• Schinner, G. J.
• Schubert, E.
• Rai, A. K.
• Reuter, D.
• Wieck, A. D.
• Wurstbauer, U.
• Kotthaus, J. P.
• Holleitner, A. W.

Titel

Confocal shift interferometry of coherent emission from trapped dipolar excitons

Ist Teil von

• Applied physics letters, 2014-12, Vol.105 (24)

Ort / Verlag

Melville: American Institute of Physics

Erscheinungsjahr

2014

Link zum Volltext

Quelle

AIP Journals Complete

Beschreibungen/Notizen

• We introduce a confocal shift-interferometer based on optical fibers. The presented spectroscopy allows measuring coherence maps of luminescent samples with a high spatial resolution even at cryogenic temperatures. We apply the spectroscopy onto electrostatically trapped, dipolar excitons in a semiconductor double quantum well. We find that the measured spatial coherence length of the excitonic emission coincides with the point spread function of the confocal setup. The results are consistent with a temporal coherence of the excitonic emission down to temperatures of 250 mK.