Power density and temperature effects on the photoluminescence spectra of InAlAs/GaAlAs quantum dots

Autor: M.A. Maaref, Elisabeth Galopin, H. Riahi, Frédéric Bernardot, Aristide Lemaître, A. Ben Daly, Thierry Barisien, Christophe Testelin

Publikováno v: Superlattices and Microstructures
Superlattices and Microstructures, 2017, 104, pp.321-330. ⟨10.1016/j.spmi.2017.02.043⟩
Superlattices and Microstructures, Elsevier, 2017, 104, pp.321-330. ⟨10.1016/j.spmi.2017.02.043⟩

International audience; Photoluminescence (PL) and time-resolved photoluminescence (TRPL) measurement techniques are used to characterize the size and the density of In 1-x Al x As/Ga 0.67 Al 0.33 As quantum dots (QDs) for different QD aluminium comp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::464b91e34bff34adf0dd6d4fe7f9e78a
https://doi.org/10.1016/j.spmi.2017.02.043

The role of heavy-light-hole mixing on the optical initialization of hole spin in InAs quantum dots

Autor: Aristide Lemaître, Maria Chamarro, F. Fras, Audrey Miard, Mathieu Bernard, Frédéric Bernardot, B. Eble, Christophe Testelin, B. Siarry

Publikováno v: Journal of Physics: Condensed Matter
Journal of Physics: Condensed Matter, 2013, 25 (20), pp.202202 ⟨10.1088/0953-8984/25/20/202202⟩
Journal of Physics: Condensed Matter, IOP Publishing, 2013, 25 (20), pp.202202 ⟨10.1088/0953-8984/25/20/202202⟩

The initialization of a resident hole spin by the absorption of a circularly polarized light at resonance involves the formation of an excited state called a trion state. For a pure heavy hole, this optical initialization is mediated by the hyperfine

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c194a2a981a2351ec5d318c28dea16f
https://hal.science/hal-01229157

Hole-spin initialization and relaxation times in InAs/GaAs quantum dots

Autor: B. Eble, Frédéric Bernardot, Pascal Desfonds, F. Fras, Christophe Testelin, Maria Chamarro, Audrey Miard, Aristide Lemaître

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2011, 84, pp.125431. ⟨10.1103/PHYSREVB.84.125431⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2011, 84, pp.125431. ⟨10.1103/PHYSREVB.84.125431⟩

We study, at low temperature and zero magnetic field, the hole-spin dynamics in InAs/GaAs quantum dots. We measure the hole-spin relaxation time at a time scale longer than the dephasing time (about ten nanoseconds), imposed by the hole-nuclear hyper

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28b0e5ed61897fb7d7d474590c99e7ec
https://doi.org/10.1103/physrevb.84.125431

Electron and hole spin cooling efficiency in InAs quantum dots: The role of nuclear field

Autor: B. Eble, Valerie Thierry-Mieg, F. Fras, Thierry Amand, Xavier Marie, Christophe Testelin, B. Urbaszek, Jean-Michel Gérard, Aristide Lemaître, Frédéric Bernardot, Maria Chamarro, Audrey Miard, Pascal Desfonds

Publikováno v: Applied Physics Letters
Applied Physics Letters, 2010, 96, pp.2108. ⟨10.1063/1.3394010⟩
Applied Physics Letters, American Institute of Physics, 2010, 96, pp.2108. ⟨10.1063/1.3394010⟩

International audience; The spin dynamics of a resident carrier, hole or electron, in singly charged InAs/GaAs quantum dots has been measured by pump-probe experiments. The relative strength of the hole to the electron hyperfine couplings with nuclei

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb3ed5bd3aa4551b6b6613f3546f78b0
https://hal.science/hal-00913559/document

Experimental evidence of the hyperfine interaction between hole and nuclear spins in InAs/GaAs quantum dots

Autor: Frédéric Bernardot, Maria Chamarro, Anne Miard, Aristide Lemaître, Christophe Testelin, Pascal Desfonds, B. Eble, Andrea Balocchi, Thierry Amand, Xavier Marie

Publikováno v: Novel Materials and Devices for Spintronics
Novel Materials and Devices for Spintronics, Apr 2009, San Francisco, CA, United States. pp.25-30, ⟨10.1557/PROC-1183-FF05-01⟩
ResearcherID

Symposium on Novel Materials and Devices for Spintronics, San Francisco, CA, APR 14-17, 2009; International audience; The spin dynamics of resident holes in singly p doped InAs/GaAs quantum dots is studied by pump probe photo-induced circular dichroi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c3e0ec66eb08479fcfd569facfe2e4e
https://hal.science/hal-01229221