Giant upconversion of photoluminescence in semiconductor heterostructures

ORAL

Abstract

Photoluminescence (PL) upconversion is observed in GaAs/AlGaAs multiple quantum wells at photon energies up to 90 meV above the exciting laser and with an efficiency up to 27\% relative to normal Stokes PL excited from the two-dimensional continuum. The effect is due to electric field-induced bipolar tunneling.

*We acknowledge the financial support of the Department of Energy, Office of Science, Basic Energy Sciences

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Authors

  • A. Mascarenhas

    • National Renewable Energy Laboratory
    • National Renewable Energy Laboratory, 1617 Cole Blvd, Golden CO-80401

  • Brian Fluegel

    • National Renewable Energy Laboratory

  • David Snoke

    • Department of Physics and Astronomy, University of Pittsburgh
    • University of Pittsburgh
    • Dept. of Physics and Astronomy, University of Pittsburgh

  • Gamani Karunasiri

    • Naval Postgraduate School
    • Dept. of Physics, Naval Postgraduate School

  • L. N. Pfeiffer

    • Bell Laboratories, Lucent Technologies
    • Bell Laboratories, Alcatel-Lucent