Memory in quantum-dot photoluminescence blinking

被引：56

作者：

Stefani, FD

Zhong, XH

Knoll, W

Han, MY

Kreiter, M

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

[2] Natl Univ Singapore, Dept Mat Sci, Singapore 117543, Singapore

来源：

NEW JOURNAL OF PHYSICS | 2005年 / 7卷

关键词：

D O I：

10.1088/1367-2630/7/1/197

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate that subsequent on- and off-times of the luminescence blinking of semiconductor quantum dots (QDs) are correlated, indicating that the process behind is not memoryless. A residual memory, which has been overlooked in previous investigations of the blinking, is found to last for several (similar to 40) detected on/off cycles. No influence of the substrate nature or the excitation intensity is observed, pointing to a process intrinsic to the QDs. These results should encourage re-analysis of existing data and may represent the key to understand the underlying physical mechanism of QD luminescence blinking.

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页数：17

相关论文

共 29 条

[1]

ABEY I, 2005, PHYS REV B, V71

[2]

[Anonymous], 1998, HDB STAT METHODS ENG

[3] Evidence for a thermal contribution to emission intermittency in single CdSe/CdS core/shell nanocrystals [J].

Banin, U ;

Bruchez, M ;

Alivisatos, AP ;

Ha, T ;

Weiss, S ;

Chemla, DS .

JOURNAL OF CHEMICAL PHYSICS, 1999, 110 (02) :1195-1201

[4] Levy statistics of vibrational mode fluctuations of single molecules from surface-enhanced raman scattering [J].

Bizzarri, AR ;

Cannistraro, S .

PHYSICAL REVIEW LETTERS, 2005, 94 (06)

[5] Relationship between single quantum-dot intermittency and fluorescence intensity decays from collections of dots [J].

Chung, IH ;

Bawendi, MG .

PHYSICAL REVIEW B, 2004, 70 (16) :1-5

[6] Random telegraph signal in the photoluminescence intensity of a single quantum dot [J].

Efros, AL ;

Rosen, M .

PHYSICAL REVIEW LETTERS, 1997, 78 (06) :1110-1113

[7] Emission intensity dependence and single-exponential behavior in single colloidal quantum dot fluorescence lifetimes [J].

Fisher, BR ;

Eisler, HJ ;

Stott, NE ;

Bawendi, MG .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (01) :143-148

[8] Stretched exponential decay and correlations in the catalytic activity of fluctuating single lipase molecules [J].

Flomenbom, O ;

Velonia, K ;

Loos, D ;

Masuo, S ;

Cotlet, M ;

Engelborghs, Y ;

Hofkens, J ;

Rowan, AE ;

Nolte, RJM ;

Van der Auweraer, M ;

de Schryver, FC ;

Klafter, J .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2005, 102 (07) :2368-2372

[9] Exponential and power-law kinetics in single-molecule fluorescence intermittency [J].

Haase, M ;

Hübner, CG ;

Reuther, E ;

Herrmann, A ;

Müllen, K ;

Basché, T .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (29) :10445-10450

[10] Direct observation of the triplet lifetime quenching of single dye molecules by molecular oxygen [J].

Hübner, CG ;

Renn, A ;

Renge, I ;

Wild, UP .

JOURNAL OF CHEMICAL PHYSICS, 2001, 115 (21) :9619-9622