Transient linear birefringence in GaAs quantum wells: Magnetic field dependence of coherent exciton spin dynamics

被引：37

作者：

Worsley, RE

Traynor, NJ

Grevatt, T

Harley, RT

机构：

[1] Physics Department, The University, Southampton

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.76.3224

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use reflective probing of transient linear birefringence to study coherent exciton dynamics in GaAs quantum wells as a function of applied magnetic field at low temperatures. The results show the significance of exchange-enhanced exciton spin relaxation for dephasing at zero field. In applied field the signals show background-free quantum beating which gives the exciton g factor and field-dependent dephasing time. The latter is dominated by spin relaxation which shows for the first time the dramatic slowdown predicted in earlier work.

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页码：3224 / 3227

页数：4

相关论文

共 21 条

[1] EXCITON SPIN DYNAMICS IN GAAS HETEROSTRUCTURES [J].

BARAD, S ;

BARJOSEPH, I .

PHYSICAL REVIEW LETTERS, 1992, 68 (03) :349-352

[2] ULTRAFAST FARADAY SPECTROSCOPY IN MAGNETIC SEMICONDUCTOR QUANTUM STRUCTURES [J].

BAUMBERG, JJ ;

CROOKER, SA ;

AWSCHALOM, DD ;

SAMARTH, N ;

LUO, H ;

FURDYNA, JK .

PHYSICAL REVIEW B, 1994, 50 (11) :7689-7700

[3]

BAUMBERG JJ, 1994, PHYS REV LETT, V72, P712

[4] EXCITON SPIN RELAXATION IN THE 2D DENSE EXCITONIC PHASE - THE ROLE OF EXCHANGE INTERACTION [J].

BAYLAC, B ;

AMAND, T ;

BROUSSEAU, M ;

MARIE, X ;

DAREYS, B ;

BACQUET, G ;

BARRAU, J ;

PLANEL, R .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 1995, 10 (03) :295-301

[5] EXCHANGE INTERACTION OF EXCITONS IN GAAS HETEROSTRUCTURES [J].

BLACKWOOD, E ;

SNELLING, MJ ;

HARLEY, RT ;

ANDREWS, SR ;

FOXON, CTB .

PHYSICAL REVIEW B, 1994, 50 (19) :14246-14254

[6] SUBPICOSECOND SPIN RELAXATION DYNAMICS OF EXCITONS AND FREE-CARRIERS IN GAAS QUANTUM-WELLS [J].

DAMEN, TC ;

VINA, L ;

CUNNINGHAM, JE ;

SHAH, J ;

SHAM, LJ .

PHYSICAL REVIEW LETTERS, 1991, 67 (24) :3432-3435

[7] ULTRAFAST COHERENT CONTROL AND DESTRUCTION OF EXCITONS IN QUANTUM-WELLS [J].

HEBERLE, AP ;

BAUMBERG, JJ ;

KOHLER, K .

PHYSICAL REVIEW LETTERS, 1995, 75 (13) :2598-2601

[8] RESONANT RAYLEIGH-SCATTERING FROM AN INHOMOGENEOUSLY BROADENED TRANSITION - A NEW PROBE OF THE HOMOGENEOUS LINEWIDTH [J].

HEGARTY, J ;

STURGE, MD ;

WEISBUCH, C ;

GOSSARD, AC ;

WIEGMANN, W .

PHYSICAL REVIEW LETTERS, 1982, 49 (13) :930-932

[9]

KESTEREN HW, 1990, PHYS REV B, V41, P5283

[10] RESONANT GENERATION OF BIEXCITONS IN A GAAS QUANTUM-WELL [J].

LOVERING, DJ ;

PHILLIPS, RT ;

DENTON, GJ ;

SMITH, GW .

PHYSICAL REVIEW LETTERS, 1992, 68 (12) :1880-1883