講演情報
[8p-P04-2]Spin-optic modeling of InAs/GaAs QDs assembled by Stacked SML growth
〇Ronel Intal Roca1, Itaru Kamiya1 (1.Toyota Tech. Inst.)
キーワード：
quantum dots、submonolayer、circular polarization
Molecular beam epitaxy (MBE) -grown self-assembled InAs/GaAs quantum dots (QDs) have attracted interest in spin-optic applications due to their long spin lifetime. Whereas these nanostructures are typically assembled using the Stranski-Krastanov (SK) growth mode, it has recently been reported that QDs can also be assembled using the stacked submonolayer (SML) growth. In comparison to SK, SML growth has been reported to be more tunable, with more adjustable growth parameters. We have recently observed a high circular polarization degree (CPD) of ~19% at RT from QDs assembled by SML growth, which is much higher than the previous report. In the present work, we propose a rate equation model to analyze the observed high CPD value and to gain a better understanding of the spin dynamics in the QDs.