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dc.contributor.authorMichael M. Adachien_US
dc.contributor.authorFengjia Fanen_US
dc.contributor.authorDaniel P. Sellanen_US
dc.contributor.authorSjoerd Hooglanden_US
dc.contributor.authorOleksandr Voznyyen_US
dc.contributor.authorArjan J. Houtepenen_US
dc.contributor.authorKevin D. Parrishen_US
dc.contributor.authorPongsakorn Kanjanaboosen_US
dc.contributor.authorJonathan A. Malenen_US
dc.contributor.authorEdward H. Sargenten_US
dc.contributor.otherUniversity of Torontoen_US
dc.contributor.otherDelft University of Technologyen_US
dc.contributor.otherCarnegie Mellon Universityen_US
dc.contributor.otherMahidol Universityen_US
dc.identifier.citationNature Communications. Vol.6, (2015)en_US
dc.description.abstract© 2015 Macmillan Publishers Limited. All rights reserved. Colloidal quantum dots have grown in interest as materials for light amplification and lasing in view of their bright photoluminescence, convenient solution processing and size-controlled spectral tunability. To date, lasing in colloidal quantum dot solids has been limited to the nanosecond temporal regime, curtailing their application in systems that require more sustained emission. Here we find that the chief cause of nanosecond-only operation has been thermal runaway: the combination of rapid heat injection from the pump source, poor heat removal and a highly temperature-dependent threshold. We show microsecond-sustained lasing, achieved by placing ultra-compact colloidal quantum dot films on a thermally conductive substrate, the combination of which minimizes heat accumulation. Specifically, we employ inorganic-halide-capped quantum dots that exhibit high modal gain (1,200 cm-1) and an ultralow amplified spontaneous emission threshold (average peak power of ∼50 kW cm-2) and rely on an optical structure that dissipates heat while offering minimal modal loss.en_US
dc.rightsMahidol Universityen_US
dc.subjectBiochemistry, Genetics and Molecular Biologyen_US
dc.titleMicrosecond-sustained lasing from colloidal quantum dot solidsen_US
Appears in Collections:Scopus 2011-2015

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