---
_id: '63154'
abstract:
- lang: eng
text: GaAs quantum dots (QDs) have recently emerged as state-of-the-art
semiconductor sources of polarization-entangled photon pairs, however, without
site-control capability. In this work, we present a systematic study of epitaxially
grown GaAs/AlxGa1-xAs site-controlled pyramidal QDs possessing unrivaled excitonic
uniformity in comparison to their InGaAs counterparts or GaAs QDs fabricated by
other techniques. We have experimentally and systematically investigated the binding
energy of biexcitons, highlighting the importance of the uniformity of all excitonic
lines, rather than concentrating solely on the uniformity of the neutral exciton
as a typical figure of merit, as it is normally done in the literature. We present
optical signatures of GaAs QDs within a range of ∼250 meV with a remarkable uniformity
within each individual sample, the ability to excite the biexciton state resonantly,
and a systematic study of the fine-structure splitting (FSS) values—features important
for polarization entangled photon emission. While, in general, we observe relatively
large FSS distribution and associated non-uniformities, we discuss several strategies
to suppress the average FSS values to <15 μeV.
article_number: '073103'
author:
- first_name: Iman
full_name: Ranjbar Jahromi, Iman
last_name: Ranjbar Jahromi
- first_name: Gediminas
full_name: Juska, Gediminas
last_name: Juska
- first_name: Simone
full_name: Varo, Simone
last_name: Varo
- first_name: Francesco
full_name: Basso Basset, Francesco
last_name: Basso Basset
- first_name: Francesco
full_name: Salusti, Francesco
last_name: Salusti
- first_name: Rinaldo
full_name: Trotta, Rinaldo
last_name: Trotta
- first_name: Agnieszka
full_name: Gocalinska, Agnieszka
last_name: Gocalinska
- first_name: Francesco
full_name: Mattana, Francesco
last_name: Mattana
- first_name: Emanuele
full_name: Pelucchi, Emanuele
last_name: Pelucchi
citation:
ama: Ranjbar Jahromi I, Juska G, Varo S, et al. Optical properties and symmetry
optimization of spectrally (excitonically) uniform site-controlled GaAs pyramidal
quantum dots. Applied Physics Letters. 2021;118(7). doi:10.1063/5.0030296
apa: Ranjbar Jahromi, I., Juska, G., Varo, S., Basso Basset, F., Salusti, F., Trotta,
R., Gocalinska, A., Mattana, F., & Pelucchi, E. (2021). Optical properties
and symmetry optimization of spectrally (excitonically) uniform site-controlled
GaAs pyramidal quantum dots. Applied Physics Letters, 118(7), Article
073103. https://doi.org/10.1063/5.0030296
bibtex: '@article{Ranjbar Jahromi_Juska_Varo_Basso Basset_Salusti_Trotta_Gocalinska_Mattana_Pelucchi_2021,
title={Optical properties and symmetry optimization of spectrally (excitonically)
uniform site-controlled GaAs pyramidal quantum dots}, volume={118}, DOI={10.1063/5.0030296},
number={7073103}, journal={Applied Physics Letters}, publisher={AIP Publishing},
author={Ranjbar Jahromi, Iman and Juska, Gediminas and Varo, Simone and Basso
Basset, Francesco and Salusti, Francesco and Trotta, Rinaldo and Gocalinska, Agnieszka
and Mattana, Francesco and Pelucchi, Emanuele}, year={2021} }'
chicago: Ranjbar Jahromi, Iman, Gediminas Juska, Simone Varo, Francesco Basso Basset,
Francesco Salusti, Rinaldo Trotta, Agnieszka Gocalinska, Francesco Mattana, and
Emanuele Pelucchi. “Optical Properties and Symmetry Optimization of Spectrally
(Excitonically) Uniform Site-Controlled GaAs Pyramidal Quantum Dots.” Applied
Physics Letters 118, no. 7 (2021). https://doi.org/10.1063/5.0030296.
ieee: 'I. Ranjbar Jahromi et al., “Optical properties and symmetry optimization
of spectrally (excitonically) uniform site-controlled GaAs pyramidal quantum dots,”
Applied Physics Letters, vol. 118, no. 7, Art. no. 073103, 2021, doi: 10.1063/5.0030296.'
mla: Ranjbar Jahromi, Iman, et al. “Optical Properties and Symmetry Optimization
of Spectrally (Excitonically) Uniform Site-Controlled GaAs Pyramidal Quantum Dots.”
Applied Physics Letters, vol. 118, no. 7, 073103, AIP Publishing, 2021,
doi:10.1063/5.0030296.
short: I. Ranjbar Jahromi, G. Juska, S. Varo, F. Basso Basset, F. Salusti, R. Trotta,
A. Gocalinska, F. Mattana, E. Pelucchi, Applied Physics Letters 118 (2021).
date_created: 2025-12-16T15:19:24Z
date_updated: 2026-09-14T11:10:57Z
doi: 10.1063/5.0030296
intvolume: ' 118'
issue: '7'
language:
- iso: eng
publication: Applied Physics Letters
publication_identifier:
issn:
- 0003-6951
- 1077-3118
publication_status: published
publisher: AIP Publishing
status: public
title: Optical properties and symmetry optimization of spectrally (excitonically)
uniform site-controlled GaAs pyramidal quantum dots
type: journal_article
user_id: '94793'
volume: 118
year: '2021'
...