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.
| Original language | English |
|---|---|
| Pages (from-to) | 672-675 |
| Number of pages | 4 |
| Journal | Science |
| Volume | 365 |
| Issue number | 6454 |
| DOIs | |
| Publication status | Published - Jan 1 2019 |
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Cite this
Sub–single-exciton lasing using charged quantum dots coupled to a distributed feedback cavity. / Kozlov, Oleg V.; Park, Young Shin; Roh, Jeongkyun; Fedin, Igor; Nakotte, Tom; Klimov, Victor I.
In: Science, Vol. 365, No. 6454, 01.01.2019, p. 672-675.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Sub–single-exciton lasing using charged quantum dots coupled to a distributed feedback cavity
AU - Kozlov, Oleg V.
AU - Park, Young Shin
AU - Roh, Jeongkyun
AU - Fedin, Igor
AU - Nakotte, Tom
AU - Klimov, Victor I
PY - 2019/1/1
Y1 - 2019/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85070701393&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070701393&partnerID=8YFLogxK
U2 - 10.1126/science.aax3489
DO - 10.1126/science.aax3489
M3 - Article
C2 - 31416959
AN - SCOPUS:85070701393
VL - 365
SP - 672
EP - 675
JO - Science
JF - Science
SN - 0036-8075
IS - 6454
ER -