Time-resolved photoluminescence spectra of high-density InGaAs/AlGaAs quantum wire structures

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• 作者：Tsurumachi ; Noriaki ; Son ; Chang-Sik ; Geun Kim ; Tae ; Hikosaka ; Kazunori ; Komori ; Kazuhiro ; Ogura ; Mutsuo
• 关键词：85.30.Vm ; 78.55.&minus ; m ; 78.47.+p ; Quantum wire ; Time-resolved Photoluminescence ; Localized exciton
• 刊名：Physica E
• 出版年：2004
• 出版时间：March, 2004
• 年：2004
• 卷：21
• 期：2-4
• 页码：300-303
• 全文大小：263 K

文摘

We investigated the temperature dependence of the time-resolved photoluminescence (PL) spectra of high-density InGaAs/AlGaAs quantum wire (QWR) distributed-feedback laser structure on a submicron grating. A red-shift of peak in the time-resolved PL after photo-excitation was observed due to the relaxation of the photo-generated excitons from the entire QWR to localized centers at 10K. On the other hand, at 60K, no red-shift in the time-resolved PL spectra was observed since the localization centers are thermally activated and the excitons are delocalized.