Intersubband exchange interaction induced by optically excited electron spins in GaAs/AlGaAs quantum wells

K. Morita; H. Sanada; S. Matsuzaka; Y. Ohno; H. Ohno

doi:10.1063/1.3118584

Intersubband exchange interaction induced by optically excited electron spins in GaAs/AlGaAs quantum wells

K. Morita, H. Sanada, S. Matsuzaka, Y. Ohno, H. Ohno

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Abstract

Spin-dependent intersubband excitonic interactions have been investigated in GaAs/AlGaAs quantum wells by two-color pump and probe spectroscopy. We generated spin-polarized electrons in the lowest subband by resonant excitation of the heavy-hole exciton (E1 -HH1) and observed polarization-dependent broadening of the second-subband exciton resonance (E2 -HH2 and E2 -LH1). The exchange interaction between the first and the second-subband excitons is found to play a crucial role in polarization-dependent spectral modulation as well as spin-independent Coulomb screening.

Original language	English
Article number	162104
Journal	Applied Physics Letters
Volume	94
Issue number	16
DOIs	https://doi.org/10.1063/1.3118584
Publication status	Published - 2009

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Intersubband exchange interaction induced by optically excited electron spins in GaAs/AlGaAs quantum wells",

abstract = "Spin-dependent intersubband excitonic interactions have been investigated in GaAs/AlGaAs quantum wells by two-color pump and probe spectroscopy. We generated spin-polarized electrons in the lowest subband by resonant excitation of the heavy-hole exciton (E1 -HH1) and observed polarization-dependent broadening of the second-subband exciton resonance (E2 -HH2 and E2 -LH1). The exchange interaction between the first and the second-subband excitons is found to play a crucial role in polarization-dependent spectral modulation as well as spin-independent Coulomb screening.",

author = "K. Morita and H. Sanada and S. Matsuzaka and Y. Ohno and H. Ohno",

note = "Funding Information: The authors wish to acknowledge K. Ohtani and M. Kohda for useful discussions. This work was partly supported by Ministry of Education, Culture, Sports, Science and Technology (MEXT) (Grant No. 17686001 and 14076203), Japan Society for the Promotion of Science (JSPS) (Grant No. 14205002).",

year = "2009",

doi = "10.1063/1.3118584",

language = "English",

volume = "94",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "16",

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TY - JOUR

T1 - Intersubband exchange interaction induced by optically excited electron spins in GaAs/AlGaAs quantum wells

AU - Morita, K.

AU - Sanada, H.

AU - Matsuzaka, S.

AU - Ohno, Y.

AU - Ohno, H.

N1 - Funding Information: The authors wish to acknowledge K. Ohtani and M. Kohda for useful discussions. This work was partly supported by Ministry of Education, Culture, Sports, Science and Technology (MEXT) (Grant No. 17686001 and 14076203), Japan Society for the Promotion of Science (JSPS) (Grant No. 14205002).

PY - 2009

Y1 - 2009

N2 - Spin-dependent intersubband excitonic interactions have been investigated in GaAs/AlGaAs quantum wells by two-color pump and probe spectroscopy. We generated spin-polarized electrons in the lowest subband by resonant excitation of the heavy-hole exciton (E1 -HH1) and observed polarization-dependent broadening of the second-subband exciton resonance (E2 -HH2 and E2 -LH1). The exchange interaction between the first and the second-subband excitons is found to play a crucial role in polarization-dependent spectral modulation as well as spin-independent Coulomb screening.

AB - Spin-dependent intersubband excitonic interactions have been investigated in GaAs/AlGaAs quantum wells by two-color pump and probe spectroscopy. We generated spin-polarized electrons in the lowest subband by resonant excitation of the heavy-hole exciton (E1 -HH1) and observed polarization-dependent broadening of the second-subband exciton resonance (E2 -HH2 and E2 -LH1). The exchange interaction between the first and the second-subband excitons is found to play a crucial role in polarization-dependent spectral modulation as well as spin-independent Coulomb screening.

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DO - 10.1063/1.3118584

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SN - 0003-6951

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M1 - 162104

ER -

Intersubband exchange interaction induced by optically excited electron spins in GaAs/AlGaAs quantum wells

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