TY - JOUR

T1 - Quantum beats in the polarization of the spin-dependent photon echo from donor-bound excitons in CdTe/(Cd,Mg)Te quantum wells

AU - Poltavtsev, S. V.

AU - Yugova, I. A.

AU - Babenko, Ia A.

AU - Akimov, I. A.

AU - Yakovlev, D. R.

AU - Karczewski, G.

AU - Chusnutdinow, S.

AU - Wojtowicz, T.

AU - Bayer, M.

N1 - Funding Information: The authors are thankful to V. L. Korenev for fruitful discussions. This research was supported by the Deutsche Forschungsgemeinschaft through the International Collaborative Research Centre TRR 160 (Project A3). S.V.P. and I.A.Y. acknowledge the Russian Foundation for Basic Research (Project No. 19-52-12046) and the St. Petersburg State University (Grant No. 51125686). The research in Poland was partially supported by the Foundation for Polish Science through the IRA Programme, co-financed by the EU within SG OP and by the National Science Centre through Grants No. 2017/25/B/ST3/02966 and No. 2018/30/M/ST3/00276. Publisher Copyright: © 2020 American Physical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/2/15

Y1 - 2020/2/15

N2 - We study the quantum beats in the polarization of the two-pulse photon echo from donor-bound exciton ensembles in semiconductor quantum wells. To induce these quantum beats, a sequence composed of a circularly polarized and a linearly polarized picosecond laser pulse in combination with an external transverse magnetic field is used. This results in an oscillatory behavior of the photon echo amplitude, detected in the σ+ and σ-circular polarizations, occurring with opposite phases relative to each other. The beating frequency is the sum of the Larmor frequencies of the resident electron and the heavy hole when the second pulse is polarized along the magnetic field. The beating frequency is, on the other hand, the difference of these Larmor frequencies when the second pulse is polarized orthogonal to the magnetic field. The measurement of both beating frequencies serves as a method to determine precisely the in-plane hole g factor, including its sign. We apply this technique to observe the quantum beats in the polarization of the photon echo from the donor-bound excitons in a 20-nm-thick CdTe/Cd0.76Mg0.24Te quantum well. From these quantum beats we obtain the in-plane heavy-hole g factor gh=-0.143±0.005.

AB - We study the quantum beats in the polarization of the two-pulse photon echo from donor-bound exciton ensembles in semiconductor quantum wells. To induce these quantum beats, a sequence composed of a circularly polarized and a linearly polarized picosecond laser pulse in combination with an external transverse magnetic field is used. This results in an oscillatory behavior of the photon echo amplitude, detected in the σ+ and σ-circular polarizations, occurring with opposite phases relative to each other. The beating frequency is the sum of the Larmor frequencies of the resident electron and the heavy hole when the second pulse is polarized along the magnetic field. The beating frequency is, on the other hand, the difference of these Larmor frequencies when the second pulse is polarized orthogonal to the magnetic field. The measurement of both beating frequencies serves as a method to determine precisely the in-plane hole g factor, including its sign. We apply this technique to observe the quantum beats in the polarization of the photon echo from the donor-bound excitons in a 20-nm-thick CdTe/Cd0.76Mg0.24Te quantum well. From these quantum beats we obtain the in-plane heavy-hole g factor gh=-0.143±0.005.

KW - CHARGED EXCITONS

KW - ELECTRON

KW - COHERENT

UR - http://www.scopus.com/inward/record.url?scp=85079796695&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.101.081409

DO - 10.1103/PhysRevB.101.081409

M3 - Article

AN - SCOPUS:85079796695

VL - 101

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 8

M1 - 081409

ER -