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- Title
Cooperative Effects in the Photoluminescence of (In,Ga)As/GaAs Quantum Dot Chain Structures.
- Authors
Mazur, Yu. I.; Dorogan, V. G.; Marega, Jr., E.; Cesar, D. F.; Lopez-Richard, V.; Marques, G. E.; Zhuchenko, Z. Ya.; Tarasov, G. G.; Salamo, G. J.
- 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.
- Subjects
PHOTOLUMINESCENCE; LUMINESCENCE; SPECTRUM analysis; NANOSTRUCTURES; ELECTRONICS
- Publication
Nanoscale Research Letters, 2010, Vol 5, Issue 6, p991
- ISSN
1931-7573
- Publication type
Article
- DOI
10.1007/s11671-010-9590-5