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Excited excitonic s...
Excited excitonic states observed in semiconductor quantum dots using polarization resolved optical spectroscopy
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- Troncale, V. (författare)
- Ecole Polytechnique Fédérale de Lausanne
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- Karlsson, Fredrik, 1974- (författare)
- Ecole Polytechnique Fédérale de Lausanne
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- Oberli, D.Y. (författare)
- Ecole Polytechnique Fédérale de Lausanne
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- Byszewski, M. (författare)
- Ecole Polytechnique Fédérale de Lausanne
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- Malko, A. (författare)
- Ecole Polytechnique Fédérale de Lausanne
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- Pelucchi, E. (författare)
- Ecole Polytechnique Fédérale de Lausanne
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- Rudra, A. (författare)
- Ecole Polytechnique Fédérale de Lausanne
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- Kapon, E. (författare)
- Ecole Polytechnique Fédérale de Lausanne
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(creator_code:org_t)
- AIP Publishing, 2007
- 2007
- Engelska.
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Ingår i: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 101, s. 081703-
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- We present results on the polarization-resolved photoluminescence emitted from InGaAs/AlGaAs single quantum dots (QDs) grown in inverted tetrahedral pyramids. The emitted light was detected for two mutually perpendicular linear polarization directions in the less conventional cleaved-edge geometry, in addition to the standard top-emission geometry. Whereas the in-plane linear polarization was isotropic, as a consequence of the high symmetry of the system, we found a strong polarization anisotropy of the edge-emitted light revealing QD states of predominantly heavy- or light-hole character. By temperature control of the charge state, several neutral and charged light-hole like exciton complexes were identified. In particular, a biexciton showing a twofold radiative recombination path, leading to two nearly perpendicularly polarized emission multiplets, was identified. These results are also of technological relevance for any design of optoelectronic QD-integrated devices
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- NATURAL SCIENCES
- NATURVETENSKAP
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