Optical investigation of InAs quantum dashes grown on InP(001) vicinal substrate

Besahraoui, F.; Bouslama, M.; Saidi, F.; Bouzaı̈ene, L.; Alouane, Mohamed Helmi Hadj; Maâref, H.; Chauvin, Nicolas; Gendry, M.; Lounis, Zoubida; Ghaffour, M.

doi:10.1016/j.spmi.2013.10.014

Cited by 5 publications

(1 citation statement)

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“…1(d) , where differences in anisotropy could have resulted in the DOLP range of 0.5 to 1.0 at 200 K. Although the control of QD anisotropy is not very straightforward, it is worth noting that control of nanostructure aspect ratio has been achieved in conventional III-V semiconductors, e.g. using miscut substrates to encourage the formation of quantum dashes 51 . Our theory thus provides a guideline to target asymmetric QD structures for achieving emitters with a further improved temperature stability of the DOLP ρ .…”

Section: Resultsmentioning

confidence: 99%

Deterministic optical polarisation in nitride quantum dots at thermoelectrically cooled temperatures

Wang

Puchtler

Patra

et al. 2017

Sci Rep

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We report the successful realisation of intrinsic optical polarisation control by growth, in solid-state quantum dots in the thermoelectrically cooled temperature regime (≥200 K), using a non-polar InGaN system. With statistically significant experimental data from cryogenic to high temperatures, we show that the average polarisation degree of such a system remains constant at around 0.90, below 100 K, and decreases very slowly at higher temperatures until reaching 0.77 at 200 K, with an unchanged polarisation axis determined by the material crystallography. A combination of Fermi-Dirac statistics and k·p theory with consideration of quantum dot anisotropy allows us to elucidate the origin of the robust, almost temperature-insensitive polarisation properties of this system from a fundamental perspective, producing results in very good agreement with the experimental findings. This work demonstrates that optical polarisation control can be achieved in solid-state quantum dots at thermoelectrically cooled temperatures, thereby opening the possibility of polarisation-based quantum dot applications in on-chip conditions.

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Section: Resultsmentioning

confidence: 99%