Correlation coefficient for dephasing of light-hole excitons and heavy-hole excitons in GaAs quantum wells

被引：14

作者：

Spivey, Amelia G. VanEngen ^{[1
]}

Borca, Camelia N. ^{[2
]}

Cundiff, Steven T. ^{[3
,4
]}

机构：

[1] Univ Puget Sound, Dept Phys, Tacoma, WA 98416 USA

[2] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[3] Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309 USA

[4] Natl Inst Stand & Technol, Boulder, CO 80309 USA

来源：

SOLID STATE COMMUNICATIONS | 2008年 / 145卷 / 5-6期

基金：

美国国家科学基金会;

关键词：

semiconductors; quantum wells; optical properties; nonlinear optics;

D O I：

10.1016/j.ssc.2007.11.006

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Dephasing of light-hole (LH) and heavy-hole (HH) excitons and of the non-radiative LH-HH exciton Raman coherence in weakly-disordered GaAs quantum wells is probed using three-beam transient four-wave mixing (TFWM). By varying the two inter-pulse delays independently, the radiative inter-band and non-radiative intra-band coherences can be probed independently. A theoretical model based on the density matrix and including inhomogeneous broadening and inhomogeneous dephasing rates is fit to the TFWM data to extract the dephasing rates. The dephasing rate of the LH-HH Raman coherence can be expressed as a function of the dephasing rates of the LH and HH excitons and a correlation coefficient, R-ph, allowing for the calculation of R-ph. We find R-ph < 0, suggesting that anti-correlated scattering dominates the exciton dephasing. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：303 / 307

页数：5

共 32 条

[1] Anomalously fast decay of the LH-HH exciton Raman coherence [J].

Borca, CN ;

Spivey, AGV ;

Cundiff, ST .

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2003, 238 (03) :521-524

[2] Dephasing of interacting heavy-hole and light-hole excitons in GaAs quantum wells [J].

Bott, K ;

Mayer, EJ ;

Smith, GO ;

Heuckeroth, V ;

Hubner, M ;

Kuhl, J ;

Meier, T ;

Schulze, A ;

Lindberg, M ;

Koch, SW ;

Thomas, P ;

Hey, R ;

Ploog, K .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1996, 13 (05) :1026-1030

[3] EFFECTS OF CORRELATION BETWEEN INHOMOGENEOUSLY BROADENED TRANSITIONS ON QUANTUM BEATS IN TRANSIENT 4-WAVE-MIXING [J].

CUNDIFF, ST .

PHYSICAL REVIEW A, 1994, 49 (04) :3114-3118

[4]

DANI DM, 2006, PHYS REV LETT, V97, DOI DOI 10.1103/PHYSREVLETT.97.057401

[5] Evidence for intervalence band coherences in semiconductor quantum wells via coherently coupled optical stark shifts -: art. no. 237402 [J].

Donovan, ME ;

Schülzgen, A ;

Lee, J ;

Blanche, PA ;

Peyghambarian, N ;

Khitrova, G ;

Gibbs, HM ;

Rumyantsev, I ;

Kwong, NH ;

Takayama, R ;

Yang, ZS ;

Binder, R .

PHYSICAL REVIEW LETTERS, 2001, 87 (23) :237402-1

[6] Stimulated and spontaneous optical generation of electron spin coherence in charged GaAs quantum dots [J].

Dutt, MVG ;

Cheng, J ;

Li, B ;

Xu, XD ;

Li, XQ ;

Berman, PR ;

Steel, DG ;

Bracker, AS ;

Gammon, D ;

Economou, SE ;

Liu, RB ;

Sham, LJ .

PHYSICAL REVIEW LETTERS, 2005, 94 (22)

[7] SPECTRALLY RESOLVED 4-WAVE-MIXING IN SEMICONDUCTORS - INFLUENCE OF INHOMOGENEOUS BROADENING [J].

ERLAND, J ;

PANTKE, KH ;

MIZEIKIS, V ;

LYSSENKO, VG ;

HVAM, JM .

PHYSICAL REVIEW B, 1994, 50 (20) :15047-15055

[8] Pure dephasing induced by exciton-phonon interactions in narrow GaAs quantum wells [J].

Fan, XD ;

Takagahara, T ;

Cunningham, JE ;

Wang, HL .

SOLID STATE COMMUNICATIONS, 1998, 108 (11) :857-861

[9] Raman quantum beats of interacting excitons [J].

Ferrio, KB ;

Steel, DG .

PHYSICAL REVIEW LETTERS, 1998, 80 (04) :786-789

[10] Well-width dependence of light-hole exciton dephasing in GaAs quantum wells [J].

Gopal, AV ;

Vengurlekar, AS .

PHYSICAL REVIEW B, 2000, 62 (07) :4624-4629

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