Spin-dependent exciton-exciton interaction in ZnSe quantum wells

D. Tröndle; S. Wachter; D. Lüerssen; H. Kalt; I. J. Blewett; I. Galbraith; K. Ohkawa; D. Hommel

doi:10.1002/1521-396X(200003)178:1<535::AID-PSSA535>3.0.CO;2-M

Spin-dependent exciton-exciton interaction in ZnSe quantum wells

D. Tröndle, S. Wachter, D. Lüerssen, H. Kalt, I. J. Blewett, I. Galbraith, K. Ohkawa, D. Hommel

School of Engineering & Physical Sciences

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3 Citations (Scopus)

Abstract

The loss of phase coherence of optically oriented excitons in ZnSe quantum wells is determined from the decay of the four-wave mixing signal in the presence of a background exciton density generated by a prepulse. The homogeneous linewidth of the exciton resonance strongly depends on the optical orientation, the density, and the spin-relaxation dynamics of the background excitons. Modelling of the data reveals that exciton-exciton interaction including fermion exchange dominates while the exciton-exciton exchange process and dipole-dipole scattering are negligible. Qualitative agreement between theory and experiment is achieved when exciton spin relaxation to dark states is considered.

Original language	English
Pages (from-to)	535-538
Number of pages	4
Journal	Physica Status Solidi (A) Applications and Materials Science
Volume	178
Issue number	1
DOIs	https://doi.org/10.1002/1521-396X(200003)178:1<535::AID-PSSA535>3.0.CO;2-M
Publication status	Published - Mar 2000
Event	Optics of Excitons in Confined Systems (OECS-6) - Ascona, Switz Duration: 30 Aug 1999 → 2 Sept 1999

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10.1002/1521-396X(200003)178:1<535::AID-PSSA535>3.0.CO;2-M

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title = "Spin-dependent exciton-exciton interaction in ZnSe quantum wells",

abstract = "The loss of phase coherence of optically oriented excitons in ZnSe quantum wells is determined from the decay of the four-wave mixing signal in the presence of a background exciton density generated by a prepulse. The homogeneous linewidth of the exciton resonance strongly depends on the optical orientation, the density, and the spin-relaxation dynamics of the background excitons. Modelling of the data reveals that exciton-exciton interaction including fermion exchange dominates while the exciton-exciton exchange process and dipole-dipole scattering are negligible. Qualitative agreement between theory and experiment is achieved when exciton spin relaxation to dark states is considered.",

author = "D. Tr{\"o}ndle and S. Wachter and D. L{\"u}erssen and H. Kalt and Blewett, {I. J.} and I. Galbraith and K. Ohkawa and D. Hommel",

year = "2000",

month = mar,

doi = "10.1002/1521-396X(200003)178:1<535::AID-PSSA535>3.0.CO;2-M",

language = "English",

volume = "178",

pages = "535--538",

journal = "Physica Status Solidi (A) Applications and Materials Science",

issn = "1862-6300",

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number = "1",

note = "Optics of Excitons in Confined Systems (OECS-6) ; Conference date: 30-08-1999 Through 02-09-1999",

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TY - JOUR

T1 - Spin-dependent exciton-exciton interaction in ZnSe quantum wells

AU - Tröndle, D.

AU - Wachter, S.

AU - Lüerssen, D.

AU - Kalt, H.

AU - Blewett, I. J.

AU - Galbraith, I.

AU - Ohkawa, K.

AU - Hommel, D.

PY - 2000/3

Y1 - 2000/3

N2 - The loss of phase coherence of optically oriented excitons in ZnSe quantum wells is determined from the decay of the four-wave mixing signal in the presence of a background exciton density generated by a prepulse. The homogeneous linewidth of the exciton resonance strongly depends on the optical orientation, the density, and the spin-relaxation dynamics of the background excitons. Modelling of the data reveals that exciton-exciton interaction including fermion exchange dominates while the exciton-exciton exchange process and dipole-dipole scattering are negligible. Qualitative agreement between theory and experiment is achieved when exciton spin relaxation to dark states is considered.

AB - The loss of phase coherence of optically oriented excitons in ZnSe quantum wells is determined from the decay of the four-wave mixing signal in the presence of a background exciton density generated by a prepulse. The homogeneous linewidth of the exciton resonance strongly depends on the optical orientation, the density, and the spin-relaxation dynamics of the background excitons. Modelling of the data reveals that exciton-exciton interaction including fermion exchange dominates while the exciton-exciton exchange process and dipole-dipole scattering are negligible. Qualitative agreement between theory and experiment is achieved when exciton spin relaxation to dark states is considered.

U2 - 10.1002/1521-396X(200003)178:1<535::AID-PSSA535>3.0.CO;2-M

DO - 10.1002/1521-396X(200003)178:1<535::AID-PSSA535>3.0.CO;2-M

M3 - Article

SN - 1862-6300

VL - 178

SP - 535

EP - 538

JO - Physica Status Solidi (A) Applications and Materials Science

JF - Physica Status Solidi (A) Applications and Materials Science

IS - 1

T2 - Optics of Excitons in Confined Systems (OECS-6)

Y2 - 30 August 1999 through 2 September 1999

ER -

Spin-dependent exciton-exciton interaction in ZnSe quantum wells

Abstract

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