Highly efficient, spatially coherent distributed feedback lasers from dense colloidal quantum dot films

C. Dang; J. Lee; K. Roh; H. Kim; S. Ahn; H. Jeon; C. Breen; J. S. Steckel; S. Coe-Sullivan; A. Nurmikko

doi:10.1063/1.4826147

Highly efficient, spatially coherent distributed feedback lasers from dense colloidal quantum dot films

C. Dang, J. Lee, K. Roh, H. Kim, S. Ahn, H. Jeon, C. Breen, J. S. Steckel, S. Coe-Sullivan, A. Nurmikko

Department of Physics

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

Colloidal quantum dots (CQD) are now making their entry to full-color displays, endowed by their brightness and single-material base. By contrast, many obstacles have been encountered in their use towards lasers. We demonstrate here optically pumped distributed feedback (DFB) lasers, based on close-packed, solid films self-assembled from type-I CQDs. Notably, the single mode CQD-DFB lasers could reach such a low threshold as to be pumpable with a compact pulsed source in a quasi-continuous wave regime. Our results show the spatially and temporally coherent laser beam outputs with power of 400 μW and a quantum efficiency of 32%.

Original language	English
Article number	171104
Journal	Applied Physics Letters
Volume	103
Issue number	17
DOIs	https://doi.org/10.1063/1.4826147
State	Published - 21 Oct 2013

Bibliographical note

Funding Information:
Financial support for this research was provided by the National Science Foundation under grant: ECCS-1128331 and Department of Energy (BES office) under Grant: DE-FG02-07ER46387.

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abstract = "Colloidal quantum dots (CQD) are now making their entry to full-color displays, endowed by their brightness and single-material base. By contrast, many obstacles have been encountered in their use towards lasers. We demonstrate here optically pumped distributed feedback (DFB) lasers, based on close-packed, solid films self-assembled from type-I CQDs. Notably, the single mode CQD-DFB lasers could reach such a low threshold as to be pumpable with a compact pulsed source in a quasi-continuous wave regime. Our results show the spatially and temporally coherent laser beam outputs with power of 400 μW and a quantum efficiency of 32%.",

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AU - Dang, C.

AU - Lee, J.

AU - Roh, K.

AU - Kim, H.

AU - Ahn, S.

AU - Jeon, H.

AU - Breen, C.

AU - Steckel, J. S.

AU - Coe-Sullivan, S.

AU - Nurmikko, A.

N1 - Funding Information: Financial support for this research was provided by the National Science Foundation under grant: ECCS-1128331 and Department of Energy (BES office) under Grant: DE-FG02-07ER46387.

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Y1 - 2013/10/21

N2 - Colloidal quantum dots (CQD) are now making their entry to full-color displays, endowed by their brightness and single-material base. By contrast, many obstacles have been encountered in their use towards lasers. We demonstrate here optically pumped distributed feedback (DFB) lasers, based on close-packed, solid films self-assembled from type-I CQDs. Notably, the single mode CQD-DFB lasers could reach such a low threshold as to be pumpable with a compact pulsed source in a quasi-continuous wave regime. Our results show the spatially and temporally coherent laser beam outputs with power of 400 μW and a quantum efficiency of 32%.

AB - Colloidal quantum dots (CQD) are now making their entry to full-color displays, endowed by their brightness and single-material base. By contrast, many obstacles have been encountered in their use towards lasers. We demonstrate here optically pumped distributed feedback (DFB) lasers, based on close-packed, solid films self-assembled from type-I CQDs. Notably, the single mode CQD-DFB lasers could reach such a low threshold as to be pumpable with a compact pulsed source in a quasi-continuous wave regime. Our results show the spatially and temporally coherent laser beam outputs with power of 400 μW and a quantum efficiency of 32%.

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Highly efficient, spatially coherent distributed feedback lasers from dense colloidal quantum dot films

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