Ultrafast dynamics of carrier-induced absorption changes in highly-excited CdSe nanocrystals

被引：59

作者：

Hunsche, S ^{[1
]}

Dekorsy, T ^{[1
]}

Klimov, V ^{[1
]}

Kurz, H ^{[1
]}

机构：

[1] RHEIN WESTFAL TH AACHEN,INST HALBLEITERTECH 2,D-52056 AACHEN,GERMANY

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 1996年 / 62卷 / 01期

关键词：

D O I：

10.1007/BF01081240

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We use femtosecond time-resolved transmission spectroscopy to study the density and time dependence of transient absorption changes of CdSe nanocrystals. Our data show pronounced absorption saturation up to complete bleaching of the lowest optical transition. At high carrier density the nonlinear spectra show several peaks that can be related to the two lowest quantized electron states. Thetime dependence of the carrier-induced absorption changes indicates an ultrafast relaxation process within the strongly broadened absorption lines.

引用

页码：3 / 10

页数：8

共 39 条

[1]

[Anonymous], 1988, Optical Nonlinearities and Instabilities in Semiconductors

[2] SURFACE-POLARIZATION INSTABILITIES OF ELECTRON-HOLE PAIRS IN SEMICONDUCTOR QUANTUM DOTS [J].

BANYAI, L ;

GILLIOT, P ;

HU, YZ ;

KOCH, SW .

PHYSICAL REVIEW B, 1992, 45 (24) :14136-14142

[3] ELECTRONIC-STRUCTURE AND PHOTOEXCITED-CARRIER DYNAMICS IN NANOMETER-SIZE CDSE CLUSTERS [J].

BAWENDI, MG ;

WILSON, WL ;

ROTHBERG, L ;

CARROLL, PJ ;

JEDJU, TM ;

STEIGERWALD, ML ;

BRUS, LE .

PHYSICAL REVIEW LETTERS, 1990, 65 (13) :1623-1626

[4] LUMINESCENCE PROPERTIES OF CDSE QUANTUM CRYSTALLITES - RESONANCE BETWEEN INTERIOR AND SURFACE LOCALIZED STATES [J].

BAWENDI, MG ;

CARROLL, PJ ;

WILSON, WL ;

BRUS, LE .

JOURNAL OF CHEMICAL PHYSICS, 1992, 96 (02) :946-954

[5] ZERO-DIMENSIONAL EXCITONS IN SEMICONDUCTOR CLUSTERS [J].

BRUS, L .

IEEE JOURNAL OF QUANTUM ELECTRONICS, 1986, 22 (09) :1909-1914

[6] CORRELATION BETWEEN THE STRUCTURAL AND OPTICAL-PROPERTIES OF POLYDISPERSED II-VI QUANTUM DOTS IN GLASS MATRIX [J].

CINGOLANI, R ;

MORO, C ;

MANNO, D ;

STRICCOLI, M ;

DEBLASI, C ;

RIGHINI, GC ;

FERRARA, M .

JOURNAL OF APPLIED PHYSICS, 1991, 70 (11) :6898-6901

[7]

COLVIN VL, 1994, SPRINGER SER CHEM PH, V60, P351

[8] SUBPICOSECOND CARRIER TRANSPORT IN GAAS SURFACE-SPACE-CHARGE FIELDS [J].

DEKORSY, T ;

PFEIFER, T ;

KUTT, W ;

KURZ, H .

PHYSICAL REVIEW B, 1993, 47 (07) :3842-3849

[9] EVIDENCE OF STRONG AUGER RECOMBINATION IN SEMICONDUCTOR-DOPED GLASSES [J].

DEROUGEMONT, F ;

FREY, R ;

ROUSSIGNOL, P ;

RICARD, D ;

FLYTZANIS, C .

APPLIED PHYSICS LETTERS, 1987, 50 (23) :1619-1621

[10]

Dneprovskii V. S., 1993, Physics of the Solid State, V35, P1297

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