QUANTUM BEATS IN PICOSECOND TIME-RESOLVED RESONANT LIGHT-SCATTERING OF FREE-EXCITONS IN AGBR

被引：7

作者：

LANGER, V

STOLZ, H

VONDEROSTEN, W

机构：

[1] Fachbereich Physik, Universität-GH, D-4790 Paderborn

来源：

JOURNAL OF LUMINESCENCE | 1990年 / 45卷 / 1-6期

关键词：

D O I：

10.1016/0022-2313(90)90206-Q

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Experiments are reported in which quantum beats are observed in the resonance fluorescence of a free exciton in a solid. The beats are generated in AgBr at 2 K by pulsed excitation of the Γ+6 ⊗ L-4,5 indirect singlet-triplet exciton state split in magnetic fields up to 4 T. Originating from the coherent superposition of the split states, damped oscillations occur superimposed on the decay of the 2TO(L) scattered intensity. The quantum-beat signals calculated by means of the density matrix formalism are found to be in good agreement with the experiment. From the beat frequencies the splitting of the exciton states is obtained with high accuracy. Quantum dephasing times of several hundreds of picoseconds are determined dependent on exciton energy and magnetic field strength. © 1990.

引用

页码：406 / 408

页数：3

共 7 条

[1] FEMTOSECOND PHOTON-ECHOES FROM BAND-TO-BAND TRANSITIONS IN GAAS [J].

BECKER, PC ;

FRAGNITO, HL ;

CRUZ, CHB ;

FORK, RL ;

CUNNINGHAM, JE ;

HENRY, JE ;

SHANK, CV .

PHYSICAL REVIEW LETTERS, 1988, 61 (14) :1647-1649

[2] FEMTOSECOND STUDIES OF COHERENT TRANSIENTS IN SEMICONDUCTORS [J].

FLUEGEL, B ;

PEYGHAMBARIAN, N ;

OLBRIGHT, G ;

LINDBERG, M ;

KOCH, SW ;

JOFFRE, M ;

HULIN, D ;

MIGUS, A ;

ANTONETTI, A .

PHYSICAL REVIEW LETTERS, 1987, 59 (22) :2588-2591

[3]

HAROCHE S, 1976, HIGH RESOLUTION LASE

[4]

MASUMOTO Y, 1983, PHYS REV LETT, V51, P923, DOI 10.1103/PhysRevLett.51.923

[5]

PIKUS GE, 1982, EXCITIONS

[6] PICOSECOND PHASE COHERENCE AND ORIENTATIONAL RELAXATION OF EXCITONS IN GAAS [J].

SCHULTHEIS, L ;

KUHL, J ;

HONOLD, A ;

TU, CW .

PHYSICAL REVIEW LETTERS, 1986, 57 (14) :1797-1800

[7]

STOLZ H, 1985, J PHYS C SOLID STATE, V12, P293

← 1 →