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.

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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