Picosecond time-resolved bleaching dynamics of self-assembled quantum dots

Author

Bogaart, E.W. ; Haverkort, J.E.M. ; Mano, T. ; Nötzel, R. ; Wolter, J.H. ; Lever, P. ; Tan, H.H. ; Jagadish, C.

Author_Institution

Dept. of Phys., Eindhoven Univ. of Technol., Netherlands

Volume

2

fYear

2003

fDate

12-14 Aug. 2003

Firstpage

663

Abstract

Picosecond bleaching dynamics of vertically stacked self-assembled quantum dots is investigated by means of time-resolved pump-probe differential reflection spectroscopy at room temperature. This allows us to study the dynamics of the pump generated carriers within the quantum dots. We observe that the absorption spectrum is shifted over 12 meV with respect to the photoluminescence spectrum. From the time-resolved measurements we detect that the carrier lifetime within the dots strongly depends on the energy within the absorption spectrum.

Keywords

III-V semiconductors; carrier lifetime; gallium arsenide; indium compounds; optical saturable absorption; photoluminescence; reflectivity; self-assembly; semiconductor quantum dots; time resolved spectra; 293 to 298 K; InAs-GaAs; InGaAs-GaAs; absorption spectra; carrier lifetime; photoluminescence spectra; picosecond time resolved bleaching dynamics; pump generated carriers; quantum dots; room temperature; self-assembly; time resolved measurements; time resolved pump probe differential reflection spectroscopy; Absorption; Bleaching; Gallium arsenide; Optical pumping; Optical reflection; Photoluminescence; Quantum dots; Spectroscopy; Temperature; US Department of Transportation;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology, 2003. IEEE-NANO 2003. 2003 Third IEEE Conference on

Print_ISBN

0-7803-7976-4

Type

conf

DOI

10.1109/NANO.2003.1230999

Filename

1230999