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Cooperative Effects in the Photoluminescence of (In,Ga)As/GaAs Quantum Dot Chain Structures

Mazur, Yu. I. and Dorogan, V. G. and Marega, E. and Cesar, D. F. and Lopez-Richard, V. and Marques, G. E. and Zhuchenko, Z. Ya. and Tarasov, G. G. and Salamo, G. J. (2010) Cooperative Effects in the Photoluminescence of (In,Ga)As/GaAs Quantum Dot Chain Structures. NANOSCALE RESEARCH LETTERS, 5 (6). pp. 991-1001. ISSN 1931-7573 (Print) 1556-276X (Online)

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Official URL: http://www.springerlink.com/content/57l2707x21n711...

Abstract

Multilayer In0.4Ga0.6As/GaAs quantum dot (QD) chain samples are investigated by means of cw and time-resolved photoluminescence (PL) spectroscopy in order to study the peculiarities of interdot coupling in such nanostructures. The temperature dependence of the PL has revealed details of the confinement. Non-thermal carrier distribution through in-chain, interdot wave function coupling is found. The peculiar dependences of the PL decay time on the excitation and detection energies are ascribed to the electronic interdot coupling and the long-range coupling through the radiation field. It is shown that the dependence of the PL decay time on the excitation wavelength is a result of the superradiance effect.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Quantum phenomena
Physical Science > Photonics
ID Code:9282
Deposited By:M T V
Deposited On:03 Jun 2010 14:23
Last Modified:03 Jun 2010 14:23

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