QUENCHING OF THE SUPERRADIATIVE DECAY BY CONFINED ACOUSTIC-PHONONS IN CDS MICROCRYSTALLITES

被引：24

作者：

MISAWA, K ^{[1
]}

YAO, H ^{[1
]}

HAYASHI, T ^{[1
]}

KOBAYASHI, T ^{[1
]}

机构：

[1] MITSUI TOATSU CHEM CO LTD,CENT RES INST,SAKAE KU,YOKOHAMA 247,JAPAN

来源：

JOURNAL OF LUMINESCENCE | 1991年 / 48-9卷

关键词：

D O I：

10.1016/0022-2313(91)90120-K

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report picosecond dynamics of excitons in CdS microcrystallites. We investigated the temperature dependence of the lifetime of the band-edge emission due to the exciton direct recombination using a UV picosecond laser and a synchroscan streak camera. The lifetime was found to be almost constant below a threshold temperature (45 +/- 5 K) and to increase proportionally with temperature above this temperature, suggesting the quenching of the superradiance of excitons by the scattering with acoustic-phonons confined in the microcrystallites. The threshold temperature corresponds to the frequency of the radial compression mode (35 cm-1 = 51 K) of the spherical microcrystallites.

引用

页码：269 / 272

页数：4

共 18 条

[1] ELECTRONIC STATES OF SEMICONDUCTOR CLUSTERS - HOMOGENEOUS AND INHOMOGENEOUS BROADENING OF THE OPTICAL-SPECTRUM [J].

ALIVISATOS, AP ;

HARRIS, AL ;

LEVINOS, NJ ;

STEIGERWALD, ML ;

BRUS, LE .

JOURNAL OF CHEMICAL PHYSICS, 1988, 89 (07) :4001-4011

[2] ELECTRON ELECTRON AND ELECTRON-HOLE INTERACTIONS IN SMALL SEMICONDUCTOR CRYSTALLITES - THE SIZE DEPENDENCE OF THE LOWEST EXCITED ELECTRONIC STATE [J].

BRUS, LE .

JOURNAL OF CHEMICAL PHYSICS, 1984, 80 (09) :4403-4409

[3] DEPHASING-INDUCED DAMPING OF SUPERRADIANT EMISSION IN J-AGGREGATES [J].

DEBOER, S ;

WIERSMA, DA .

CHEMICAL PHYSICS LETTERS, 1990, 165 (01) :45-53

[4] QUANTUM SIZE EFFECT IN SEMICONDUCTOR MICROCRYSTALS [J].

EKIMOV, AI ;

EFROS, AL ;

ONUSHCHENKO, AA .

SOLID STATE COMMUNICATIONS, 1985, 56 (11) :921-924

[5] RAPID RADIATIVE DECAY AND ENHANCED OPTICAL NONLINEARITY OF EXCITONS IN A QUANTUM WELL [J].

HANAMURA, E .

PHYSICAL REVIEW B, 1988, 38 (02) :1228-1234

[6]

HELLWEGE KH, 1982, LANDOLTBORNSTEIN NUM, V17

[7] SIZE-DEPENDENT RADIATIVE DECAY TIME OF CONFINED EXCITONS IN CUCL MICROCRYSTALS [J].

ITOH, T ;

FURUMIYA, M ;

IKEHARA, T ;

GOURDON, C .

SOLID STATE COMMUNICATIONS, 1990, 73 (04) :271-274

[8] DEGENERATE 4-WAVE MIXING IN SEMICONDUCTOR-DOPED GLASSES [J].

JAIN, RK ;

LIND, RC .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1983, 73 (05) :647-653

[9] TEMPERATURE-DEPENDENT ACTIVATION-ENERGY FOR ELECTRON-TRANSFER BETWEEN BIOLOGICAL MOLECULES [J].

JORTNER, J .

JOURNAL OF CHEMICAL PHYSICS, 1976, 64 (12) :4860-4867

[10]

KOBAYASHI T, 1990, SPIE P, V1216, P105

← 1 2 →