Direct Comparison of Biexciton Binding Energy in a Quantum Well and Quantum Dots | Zendy

Michio Ikezawa | Zendy

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Direct Comparison of Biexciton Binding Energy in a Quantum Well and Quantum Dots

Author(s) -

Michio Ikezawa

Publication year - 2005

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.1994309

Subject(s) - biexciton , quantum dot , binding energy , physics , condensed matter physics , oscillation (cell signaling) , exciton , magnetic field , atomic physics , quantum mechanics , chemistry , biochemistry

Periodic oscillation is observed in transient four-wave mixing signal in strain-induced GaAs quantum dots. The oscillation is assigned to biexcitonic beat based on its polarization dependence and its initial phase, and the biexciton binding energy is deduced. Since strain-induced dots are produced by adding lateral confinement to a quantum well, direct comparison of the biexciton binding energy in 2D and in 0D system is possible. The beat period in quantum dots is found to be shorter than that in quantum well, and the enhancement factor by the reduced dimensionality is 1.5. Magnetic field dependence of the biexciton binding energy is also studied. It is independent of the magnetic field up to 8 T, and exciton g-factor in the strain-induced dots is obtained

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