MAGNETO-QUANTUM BEATS AND COHERENCE IN RESONANT LIGHT-SCATTERING FROM QUADRUPOLE POLARITONS IN CU2O

被引：9

作者：

LANGER, V ^{[1
]}

STOLZ, H ^{[1
]}

VONDEROSTEN, W ^{[1
]}

FROHLICH, D ^{[1
]}

KULIK, A ^{[1
]}

UEBBING, B ^{[1
]}

机构：

[1] UNIV DORTMUND, INST PHYS, W-4600 DORTMUND, GERMANY

来源：

EUROPHYSICS LETTERS | 1992年 / 18卷 / 08期

关键词：

EXCITONS AND RELATED PHENOMENA; QUANTUM OPTICS; TIME-RESOLVED OPTICAL SPECTROSCOPIES AND OTHER ULTRAFAST OPTICAL MEASUREMENTS IN CONDENSED MATTER;

D O I：

10.1209/0295-5075/18/8/010

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using picosecond time-resolved light scattering, we observe quantum beats of the 1S yellow exciton-polariton in Cu2O, split by a magnetic field, both in one- and two-phonon scattering. From these measurements Raman and hot-luminescence-like contributions to these processes can be discriminated. A quantitative analysis leads to exciton-polariton coherence times up to 800 ps which strongly decrease at larger wave vectors and higher temperatures due to phonon scattering. From the magnetic-field dependence of the beat frequencies an accurate effective g-value is obtained.

引用

页码：723 / 728

页数：6

共 14 条

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