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Hamamatsu Corp. - Earth Innovations LB 2/24

Quantum Dots and Quantum Wells Go Head-to-Head

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Daniel S. Burgess

In the pursuit of more efficient GaAs-based emitters for telecommunications applications, researchers at Laboratorio Nazionale TASC-INFM and the University of Trieste, both in Italy, have performed a comparison of the photoluminescence of InAsN quantum dots and InGaAsN/GaAs quantum wells produced in the same molecular beam epitaxy reactor. Their work indicates that quantum dots display higher thermal stability than quantum wells, and that the use of GaAsN rather than GaAs barriers with the dots yields more intense and narrower luminescence. In the experiments, the scientists fabricated...Read full article

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    Published: July 2005
    Glossary
    photoluminescence
    The state of optically excited luminescence. Luminescence refers to the light emitted by excited atoms or ions as they decay to lower energy levels.
    CommunicationsFeaturesGaAs-based emittersindustrialLaboratorio Nazionale TASC-INFMphotoluminescencetelecommunications applications

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