The control over the spectral broadening of an ensemble of emitters, mainly attributable to the size and shape dispersion and the homogenous broadening mechanisms, is crucial to several applications of quantum dots. We present a convenient self-assembly approach to deliver strain-free GaAs quantum dots with size dispersion below 10%, due to the control of the growth parameters during the preliminary formation of the Ga droplets. This results in an ensemble photoluminescence linewidth of 19 meV at 14 K. The narrow emission band and the absence of a wetting layer promoting dot-dot coupling allow us to deconvolve the contribution of phonon broadening in the ensemble photoluminescence and study it in a wide temperature range.

Basset, F., Bietti, S., Tuktamyshev, A., Vichi, S., Bonera, E., Sanguinetti, S. (2019). Spectral broadening in self-assembled GaAs quantum dots with narrow size distribution. JOURNAL OF APPLIED PHYSICS, 126(2), 024301 [10.1063/1.5097277].

Spectral broadening in self-assembled GaAs quantum dots with narrow size distribution

Basset, FB;Bietti, S
Membro del Collaboration Group
;
Tuktamyshev, A;Vichi, S
Membro del Collaboration Group
;
Bonera, E
Membro del Collaboration Group
;
Sanguinetti, S
Membro del Collaboration Group
2019

Abstract

The control over the spectral broadening of an ensemble of emitters, mainly attributable to the size and shape dispersion and the homogenous broadening mechanisms, is crucial to several applications of quantum dots. We present a convenient self-assembly approach to deliver strain-free GaAs quantum dots with size dispersion below 10%, due to the control of the growth parameters during the preliminary formation of the Ga droplets. This results in an ensemble photoluminescence linewidth of 19 meV at 14 K. The narrow emission band and the absence of a wetting layer promoting dot-dot coupling allow us to deconvolve the contribution of phonon broadening in the ensemble photoluminescence and study it in a wide temperature range.
Articolo in rivista - Articolo scientifico
Quantum dots, GaAs, Droplet Epitaxy
English
2019
126
2
024301
024301
reserved
Basset, F., Bietti, S., Tuktamyshev, A., Vichi, S., Bonera, E., Sanguinetti, S. (2019). Spectral broadening in self-assembled GaAs quantum dots with narrow size distribution. JOURNAL OF APPLIED PHYSICS, 126(2), 024301 [10.1063/1.5097277].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/256327
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