Experimental investigation and modeling of the fine structure
splitting of neutral excitons in strain-free GaAs/AlxGa1-xAs
quantum dots

J 2010

Experimental investigation and modeling of the fine structure splitting of neutral excitons in strain-free GaAs/AlxGa1-xAs quantum dots

PLUMHOF, Johannes; Vlastimil KŘÁPEK; LiJuan WANG; Andrei SCHLIWA; Dieter BIMBERG et al.

Základní údaje

Originální název

Experimental investigation and modeling of the fine structure splitting of neutral excitons in strain-free GaAs/AlxGa1-xAs quantum dots

Autoři

PLUMHOF, Johannes; Vlastimil KŘÁPEK; LiJuan WANG; Andrei SCHLIWA; Dieter BIMBERG; Armando RASTELLI a Oliver SCHMIDT

Vydání

Physical Review B, USA, The American Physical Society, 2010, 1098-0121

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10302 Condensed matter physics

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 3.774

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/10:00043625

Organizační jednotka

Přírodovědecká fakulta

UT WoS

000276248900018

Klíčová slova česky

rozstepeni jemne struktury; kvantove tecky

Klíčová slova anglicky

fine structure splitting; quantum dots

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 9. 4. 2010 15:42, Mgr. Vlastimil Křápek, Ph.D.

Anotace

ORIG CZ

V originále

We measure, by photoluminescence spectroscopy, the fine structure splitting (FSS) of bright excitons confined in a large number of elongated and unstrained Al0.35Ga0.65As/GaAs/Al0.45Ga0.55As quantum dots (QDs) and quantum-well potential fluctuations (QWPFs). While the FSS values are comparable, the light polarization directions for well-oriented QDs and randomly oriented QWPFs on the same sample are substantially different. We compare the results with model calculations using as input scanning probe microscopy data of QD structures nominally identical to those investigated by photoluminescence. The model reproduces well the polarization orientation for all studied samples and also the magnitude of the FSS, at least for relatively tall dots. We discuss the results and elucidate the role of in-plane elongation on the FSS.

Česky

Pomoci fotoluminiscencni spektroskopie jsme urcili rozstepeni jemne struktury zariveho excitonu v protazenych kvantovych teckach Al0.35Ga0.65As/GaAs/Al0.45Ga0.55As bez elastickeho pnuti.

Návaznosti

GA202/06/0718, projekt VaV

Název: Inženýrství kvantových teček

Investor: Grantová agentura ČR, Inženýrství kvantových teček

MSM0021622410, záměr

Název: Fyzikální a chemické vlastnosti pokročilých materiálů a struktur

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Fyzikální a chemické vlastnosti pokročilých materiálů a struktur

Citovat

PLUMHOF, Johannes; Vlastimil KŘÁPEK; LiJuan WANG; Andrei SCHLIWA; Dieter BIMBERG; Armando RASTELLI a Oliver SCHMIDT. Experimental investigation and modeling of the fine structure splitting of neutral excitons in strain-free GaAs/AlxGa1-xAs quantum dots. Physical Review B. USA: The American Physical Society, 2010, roč. 81, č. 12, s. 1309(R), 4 s. ISSN 1098-0121.

@article{878372,
   author = {Plumhof, Johannes and Křápek, Vlastimil and Wang, LiJuan and Schliwa, Andrei and Bimberg, Dieter and Rastelli, Armando and Schmidt, Oliver},
   article_location = {USA},
   article_number = {12},
   keywords = {fine structure splitting; quantum dots},
   language = {eng},
   issn = {1098-0121},
   journal = {Physical Review B},
   title = {Experimental investigation and modeling of the fine structure splitting of neutral excitons in strain-free GaAs/AlxGa1-xAs quantum dots},
   url = {http://link.aps.org/doi/10.1103/PhysRevB.81.121309},
   volume = {81},
   year = {2010}
}

TY  - JOUR
ID  - 878372
AU  - Plumhof, Johannes - Křápek, Vlastimil - Wang, LiJuan - Schliwa, Andrei - Bimberg, Dieter - Rastelli, Armando - Schmidt, Oliver
PY  - 2010
TI  - Experimental investigation and modeling of the fine structure splitting of neutral excitons in strain-free GaAs/AlxGa1-xAs quantum dots
JF  - Physical Review B
VL  - 81
IS  - 12
SP  - 1309(R)
EP  - 1309(R)
PB  - The American Physical Society
SN  - 10980121
KW  - fine structure splitting
KW  - quantum dots
UR  - http://link.aps.org/doi/10.1103/PhysRevB.81.121309
N2  - We measure, by photoluminescence spectroscopy, the fine structure splitting (FSS) of bright excitons confined in a large number of elongated and unstrained Al0.35Ga0.65As/GaAs/Al0.45Ga0.55As quantum dots (QDs) and quantum-well potential fluctuations (QWPFs). While the FSS values are comparable, the light polarization directions for well-oriented QDs and randomly oriented QWPFs on the same sample are substantially different. We compare the results with model calculations using as input scanning probe microscopy data of QD structures nominally identical to those investigated by photoluminescence. The model reproduces well the polarization orientation for all studied samples and also the magnitude of the FSS, at least for relatively tall dots. We discuss the results and elucidate the role of in-plane elongation on the FSS.
ER  -

PLUMHOF, Johannes; Vlastimil KŘÁPEK; LiJuan WANG; Andrei SCHLIWA; Dieter BIMBERG; Armando RASTELLI a Oliver SCHMIDT. Experimental investigation and modeling of the fine structure splitting of neutral excitons in strain-free GaAs/AlxGa1-xAs quantum dots. \textit{Physical Review B}. USA: The American Physical Society, 2010, roč.~81, č.~12, s.~1309(R), 4 s. ISSN~1098-0121.

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