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Multimode laser emission from laterally confined organic microcavities
Room-temperature multimode laser emission is observed in a microcavity consisting of dielectric mirrors and small-molecular-weight organic photonic dots as a cavity layer. The structure shows simultan...

Room temperature midinfrared electroluminescence from InAs quantum dots

Appl. Phys. Lett. 94, 061101 (2009); doi:10.1063/1.3080688

Published 9 February 2009

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D. Wasserman,1 T. Ribaudo,1 S. A. Lyon,2 S. K. Lyo,3 and E. A. Shaner3
1Department of Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA
2Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA
3Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185, USA
We demonstrate room temperature midinfrared electroluminescence from intersublevel transitions in self-assembled InAs quantum dots. The dots are grown in GaAs/AlGaAs heterostructures designed to maximize current injection into dot excited states while preferentially removing electrons from the ground states. As such, these devices resemble quantum cascade lasers. However, rigorous modeling of carrier transport through the devices indicates that the current transport mechanism for quantum dot active regions differs from that of quantum-well-based midinfrared lasers. We present the calculated energy states and transport mechanism for an intersublevel quantum dot emitter, as well as experimental electroluminescence data for these structures. ©2009 American Institute of Physics
History: Received 16 January 2009; accepted 22 January 2009; published 9 February 2009
Permalink: http://link.aip.org/link/?APPLAB/94/061101/1
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KEYWORDS and PACS

Keywords
PACS
  • 78.67.Hc
    Optical properties of quantum dots
  • 73.63.Kv
    Quantum dots (electronic transport)
  • 73.21.La
    Quantum dots (electron states/collective excitations)
  • 78.60.Fi
    Electroluminescence (condensed matter)
  • 81.07.Ta
    Quantum dots: fabrication and characterization
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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REFERENCES (20)
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