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Title: Sub–single-exciton lasing using charged quantum dots coupled to a distributed feedback cavity

Abstract

Colloidal semiconductor quantum dots (QDs) are attractive materials for realizing highly flexible, solution-processable optical gain media, but they are difficult to use in lasing because of complications associated with extremely short optical-gain lifetimes limited by nonradiative Auger recombination. By combining compositional grading of the QD’s interior for hindering Auger decay with postsynthetic charging for suppressing parasitic ground-state absorption, we can reduce the lasing threshold to values below the single-exciton-per-dot limit. As a favorable departure from traditional multi-exciton–based lasing schemes, our approach should facilitate the development of solution-processable lasing devices and thereby help to extend the reach of lasing technologies into areas not accessible with traditional, epitaxially grown semiconductor materials.


Citation Formats

Kozlov, Oleg V., Park, Young-Shin, Roh, Jeongkyun, Fedin, Igor, Nakotte, Tom, and Klimov, Victor I. Sub–single-exciton lasing using charged quantum dots coupled to a distributed feedback cavity. United States: N. p., 2019. Web. doi:10.1126/science.aax3489.
Kozlov, Oleg V., Park, Young-Shin, Roh, Jeongkyun, Fedin, Igor, Nakotte, Tom, & Klimov, Victor I. Sub–single-exciton lasing using charged quantum dots coupled to a distributed feedback cavity. United States. doi:10.1126/science.aax3489.
Kozlov, Oleg V., Park, Young-Shin, Roh, Jeongkyun, Fedin, Igor, Nakotte, Tom, and Klimov, Victor I. Thu . "Sub–single-exciton lasing using charged quantum dots coupled to a distributed feedback cavity". United States. doi:10.1126/science.aax3489.
@article{osti_1557391,
title = {Sub–single-exciton lasing using charged quantum dots coupled to a distributed feedback cavity},
author = {Kozlov, Oleg V. and Park, Young-Shin and Roh, Jeongkyun and Fedin, Igor and Nakotte, Tom and Klimov, Victor I.},
abstractNote = {Colloidal semiconductor quantum dots (QDs) are attractive materials for realizing highly flexible, solution-processable optical gain media, but they are difficult to use in lasing because of complications associated with extremely short optical-gain lifetimes limited by nonradiative Auger recombination. By combining compositional grading of the QD’s interior for hindering Auger decay with postsynthetic charging for suppressing parasitic ground-state absorption, we can reduce the lasing threshold to values below the single-exciton-per-dot limit. As a favorable departure from traditional multi-exciton–based lasing schemes, our approach should facilitate the development of solution-processable lasing devices and thereby help to extend the reach of lasing technologies into areas not accessible with traditional, epitaxially grown semiconductor materials.},
doi = {10.1126/science.aax3489},
journal = {Science},
number = 6454,
volume = 365,
place = {United States},
year = {2019},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1126/science.aax3489

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Works referenced in this record:

Optical Gain and Stimulated Emission in Nanocrystal Quantum Dots
journal, October 2000