Direct Biexciton Creation with Two-Photon Excitation for Ideal Entangled Photon Pair Emissions in Optically Active Quantum Dots

• Hideki Gotoh

• Haruki Sanada

• Hiroshi Yamaguchi

• Tetsuomi Sogawa

Abstract

A scheme for creating biexcitons without undesirable excitons is demonstrated in GaAs quantum dots (QDs) using an optical pumping method. This scheme utilizes resonant two-photon excitation processes for biexcitons with carefully set excitation conditions. In this scheme, biexcitons are directly created from the ground state while suppressing unnecessary exciton creation. Theoretical analysis confirms that our scheme works in actual QDs. Directly created biexcitons will make ideal entangled photons via cascade photoemission processes in a biexciton–exciton system with the reduction in the number of undesirable single photons from excitons that are not related to the cascade processes.

Journal

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 52 (12R), 120202-, 2013-11-12

  IOP Publishing

Keywords

• General Physics and Astronomy
• General Engineering

Details

• CRID: 1360003449888293760
• NII Article ID: 210000143158
• DOI: 10.7567/jjap.52.120202
• ISSN: 13474065
• ISSN: 00214922
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.52.120202
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.52.120202/pdf
• Data Source:
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  • CiNii Articles
  • KAKEN