Heavy-hole–light-hole exciton system in GaAs/AlGaAs quantum wells

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Heavy-hole–light-hole exciton system in GaAs/AlGaAs quantum wells. / Bataev, M. N.; Chukeev, M. A.; Sharipova, M. M.; Belov, P. A.; Grigoryev, P. S.; Khramtsov, E. S.; Ignatiev, I. V.; Eliseev, S. A.; Lovtcius, V. A.; Efimov, Yu P.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 106, No. 8, 085407, 10.08.2022.

Research output: Contribution to journal › Article › peer-review

Author

Bataev, M. N. ; Chukeev, M. A. ; Sharipova, M. M. ; Belov, P. A. ; Grigoryev, P. S. ; Khramtsov, E. S. ; Ignatiev, I. V. ; Eliseev, S. A. ; Lovtcius, V. A. ; Efimov, Yu P. / Heavy-hole–light-hole exciton system in GaAs/AlGaAs quantum wells. In: Physical Review B - Condensed Matter and Materials Physics. 2022 ; Vol. 106, No. 8.

BibTeX

@article{891991b7a64c4effb46f12b569b2d970,

title = "Heavy-hole–light-hole exciton system in GaAs/AlGaAs quantum wells",

abstract = "Light-hole (lh) excitons (Xlhs) in quantum wells (QWs) are hardly studied compared with heavy-hole (hh) excitons (Xhhs), mainly due to the difficulties of their experimental observation. In this paper, a comprehensive study of both types of excitons in high-quality GaAs/AlGaAs QWs of different widths is performed. We focus on the energy positions of exciton resonances and the exciton-light interaction. The effect of mixing lhs and hhs in GaAs-based structures on these exciton characteristics is investigated. The corrections to the exciton energy due to mixing are only a fraction of millielectronvolts for wide QWs, in which the energy levels of Xhhs and Xlhs are close to each other. It is also experimentally found that the oscillator strength of Xlhs is ∼2.5 times less than that of Xhhs. This value noticeably deviates from the 3:1 oscillator strength ratio known for optical transitions between free electron and hole states. This deviation originates from the different squeezing of the Xlh and Xhh wave functions due to distinct values of the effective masses of the Xlh and Xhh in the heterostructure. Mixing of hh and lh valence bands is not so important.",

author = "Bataev, {M. N.} and Chukeev, {M. A.} and Sharipova, {M. M.} and Belov, {P. A.} and Grigoryev, {P. S.} and Khramtsov, {E. S.} and Ignatiev, {I. V.} and Eliseev, {S. A.} and Lovtcius, {V. A.} and Efimov, {Yu P.}",

note = "Publisher Copyright: {\textcopyright} 2022 American Physical Society.",

year = "2022",

month = aug,

day = "10",

doi = "10.1103/physrevb.106.085407",

language = "English",

volume = "106",

journal = "Physical Review B-Condensed Matter",

issn = "1098-0121",

publisher = "American Physical Society",

number = "8",

}

RIS

TY - JOUR

T1 - Heavy-hole–light-hole exciton system in GaAs/AlGaAs quantum wells

AU - Bataev, M. N.

AU - Chukeev, M. A.

AU - Sharipova, M. M.

AU - Belov, P. A.

AU - Grigoryev, P. S.

AU - Khramtsov, E. S.

AU - Ignatiev, I. V.

AU - Eliseev, S. A.

AU - Lovtcius, V. A.

AU - Efimov, Yu P.

PY - 2022/8/10

Y1 - 2022/8/10

N2 - Light-hole (lh) excitons (Xlhs) in quantum wells (QWs) are hardly studied compared with heavy-hole (hh) excitons (Xhhs), mainly due to the difficulties of their experimental observation. In this paper, a comprehensive study of both types of excitons in high-quality GaAs/AlGaAs QWs of different widths is performed. We focus on the energy positions of exciton resonances and the exciton-light interaction. The effect of mixing lhs and hhs in GaAs-based structures on these exciton characteristics is investigated. The corrections to the exciton energy due to mixing are only a fraction of millielectronvolts for wide QWs, in which the energy levels of Xhhs and Xlhs are close to each other. It is also experimentally found that the oscillator strength of Xlhs is ∼2.5 times less than that of Xhhs. This value noticeably deviates from the 3:1 oscillator strength ratio known for optical transitions between free electron and hole states. This deviation originates from the different squeezing of the Xlh and Xhh wave functions due to distinct values of the effective masses of the Xlh and Xhh in the heterostructure. Mixing of hh and lh valence bands is not so important.

AB - Light-hole (lh) excitons (Xlhs) in quantum wells (QWs) are hardly studied compared with heavy-hole (hh) excitons (Xhhs), mainly due to the difficulties of their experimental observation. In this paper, a comprehensive study of both types of excitons in high-quality GaAs/AlGaAs QWs of different widths is performed. We focus on the energy positions of exciton resonances and the exciton-light interaction. The effect of mixing lhs and hhs in GaAs-based structures on these exciton characteristics is investigated. The corrections to the exciton energy due to mixing are only a fraction of millielectronvolts for wide QWs, in which the energy levels of Xhhs and Xlhs are close to each other. It is also experimentally found that the oscillator strength of Xlhs is ∼2.5 times less than that of Xhhs. This value noticeably deviates from the 3:1 oscillator strength ratio known for optical transitions between free electron and hole states. This deviation originates from the different squeezing of the Xlh and Xhh wave functions due to distinct values of the effective masses of the Xlh and Xhh in the heterostructure. Mixing of hh and lh valence bands is not so important.

UR - http://www.scopus.com/inward/record.url?scp=85136187593&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/0eebf027-6aac-35a5-9afe-bd72dba981e8/

U2 - 10.1103/physrevb.106.085407

DO - 10.1103/physrevb.106.085407

M3 - Article

AN - SCOPUS:85136187593

VL - 106

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 8

M1 - 085407

ER -

ID: 98659567