DocumentCode :
2941280
Title :
Carrier capture and recombination dynamics in single pyramidal quantum dots
Author :
Ducommun, Y. ; Hartmann, Andreas ; Oberli, D.Y. ; Kapon, Eli
Author_Institution :
Dept. of Phys., Swiss Fed. Inst. of Technol., Lausanne, Switzerland
fYear :
2000
fDate :
10-15 Sept. 2000
Abstract :
Summary form only given. Using self-ordered growth of GaAs/AlGaAs heterostructures on patterned substrates, we have recently demonstrated the fabrication of arrays of structurally uniform quantum dots (QDs), each situated near the tip of a sharp pyramid. In these nanostructures, the occurrence of QD barriers consisting of 3D bulk material as well as 2D quantum wells and 1D quantum wires makes it possible to explore the effect of barrier-dimensionality on carrier capture, relaxation and recombination dynamics. In the present work, we use a micro-photoluminescence setup with temporal resolution in the picosecond range to study carrier capture, relaxation and recombination dynamics in single QDs of different state separation. A rate equation model yields quantitative information about the time-scale of the different processes.
Keywords :
III-V semiconductors; aluminium compounds; carrier relaxation time; electron-hole recombination; gallium arsenide; photoluminescence; semiconductor quantum dots; time resolved spectra; 1D quantum wires; 2D quantum wells; GaAs-AlGaAs; GaAs/AlGaAs heterostructures; barrier-dimensionality effect; carrier capture; carrier relaxation; micro-photoluminescence; patterned substrates; picosecond range; quantum dot barriers; rate equation model; recombination dynamics; self-ordered growth; single pyramidal quantum dots; state filling effects; structurally uniform quantum dot arrays; temporal resolution; Filling; Quantum dots; Radiative recombination; Stationary state; US Department of Transportation; Wires;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Quantum Electronics Conference, 2000. Conference Digest. 2000 International
Conference_Location :
Nice, France
Print_ISBN :
0-7803-6318-3
Type :
conf
DOI :
10.1109/IQEC.2000.908117
Filename :
908117
Link To Document :
بازگشت