|
|||||
|
|
Cooperative Effects in the Photoluminescence of (In,Ga)As/GaAs Quantum Dot Chain Structures |
|
| Authors: | Yu I Mazur V G Dorogan E Marega Jr D F Cesar V Lopez-Richard G E Marques Z Ya Zhuchenko G G Tarasov G J Salamo |
| Affiliation: | 1. Department of Physics, University of Arkansas, 226 Physics Building, Fayetteville, AR, 72701, USA 2. Departamento de Fisica, Universidade Federal de Sao Carlos, 13565-905, Sao Carlos, Sao Paulo, Brazil 3. Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 45 Nauki prospect, Kiev, 03028, Ukraine |
| 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. |
| Keywords: | Time-resolved photoluminescence Quantum dot chain Interdot coupling |
| 本文献已被 SpringerLink 等数据库收录！ | |