Published December 15, 2014 | Version v1
Journal article Metadata-only

Confocal shift interferometry of coherent emission from trapped dipolar excitons

Creators

  • 1. Center for NanoScience and Fakultät für Physik, Ludwig-Maximilians-Universität, Geschwister-Scholl-Platz 1, 80539 München (Germany)
  • 2. Nanosystems Initiative Munich (NIM), Schellingstr. 4, 80799 München (Germany)
  • 3. Walter Schottky Institut and Physik-Department, Am Coulombwall 4a, Technische Universität München, D-85748 Garching (Germany)
  • 4. Angewandte Festkörperphysik, Ruhr-Universität Bochum, Universitätsstraße 150, 44780 Bochum (Germany)
  • 5. Department Physik, Universität Paderborn, 33098 Paderborn (Germany)

Description

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

Additional details

Identifiers

DOI
10.1063/1.4904222;
arXiv
arXiv:1411.5358v1;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
105
Journal Issue
24
Journal Page Range
p. 241101-241101.4
ISSN
0003-6951
CODEN
APPLAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
46101209
Subject category
S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Descriptors DEI
COHERENCE LENGTH; EMISSION SPECTROSCOPY; EXCITONS; INTERFEROMETRY; LUMINESCENCE; OPTICAL FIBERS; QUANTUM WELLS; SEMICONDUCTOR MATERIALS; SPATIAL RESOLUTION; TEMPERATURE RANGE 0000-0013 K; TRAPPING
Descriptors DEC
DIMENSIONS; EMISSION; FIBERS; LENGTH; MATERIALS; NANOSTRUCTURES; PHOTON EMISSION; QUASI PARTICLES; RESOLUTION; SPECTROSCOPY; TEMPERATURE RANGE

Optional Information

Notes
(c) 2014 AIP Publishing LLC