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

Multilayer In(0.4)Ga(0.6)As/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 conf...

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Detalles Bibliográficos
Autores principales: Mazur, Yu I, Dorogan, VG, Marega, E, Cesar, DF, Lopez-Richard, V, Marques, GE, Zhuchenko, Z Ya., Tarasov, GG, Salamo, GJ
Formato: Texto
Lenguaje:English
Publicado: Springer 2010
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2894340/
https://www.ncbi.nlm.nih.gov/pubmed/20672035
http://dx.doi.org/10.1007/s11671-010-9590-5
Descripción
Sumario:Multilayer In(0.4)Ga(0.6)As/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.

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