Electronic Structures and Carrier Correlation in Single Pair of Coupled Quantum Dots
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概要
- 論文の詳細を見る
The electronic structures and carrier correlation in a single pair of InAs/GaAs coupled quantum dots (QDs) are investigated by performing photoluminescence (PL), one-color photoluminescence excitation (PLE) and two-color PLE measurements. Luminescence from the bonding (X+) and anti-bonding (X-) states due to the wave function coupling was observed in the micro-PL ($\mu$-PL) spectra of the coupled QDs. One-color PLE spectra reveal the electronic structures of the coupled QD system in which there is the coexistence of both common excited level series between the X+ and X- states and individual excited level series for each state. In two-color PLE measurement, the suppression of PLE peak intensity at the energy separation of the longitudinal optical (LO) phonon suggests a carrier correlation through the screening effect of the carrier–LO-phonon interaction in the coupled QD system. Additionally, we demonstrate the control of the energy state in the coupled QDs using two-color excitations.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-04-15
著者
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Komori Kazuhiro
National Institute Of Advanced Industrial Science And Technology (aist)
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MOROHASHI Isao
National Institute of Advanced Industrial Science and Technology
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SUGAYA Takeyoshi
National Institute of Advanced Industrial Science and Technology
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GOSHIMA Keishiro
National Institute of Advanced Industrial Science and Technology (AIST)
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YAMAUCHI Shohgo
National Institute of Advanced Industrial Science and Technology (AIST)
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