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231226s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202308979
|2 doi
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|a pubmed24n1294.xml
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|a (DE-627)NLM365008532
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|a (NLM)38009644
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|a DE-627
|b ger
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|a eng
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|a Li, Xueyang
|e verfasserin
|4 aut
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|a Two-Color Amplified Spontaneous Emission from Auger-Suppressed Quantum Dots in Liquids
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|c 2024
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|a Text
|b txt
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 15.02.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 Wiley-VCH GmbH.
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|a Colloidal quantum-dot (QD) lasing is normally achieved in close-packed solid-state films, as a high QD volume fraction is required for stimulated emission to outcompete fast Auger decay of optical-gain-active multiexciton states. Here a new type of liquid optical-gain medium is demonstrated, in which compact compositionally-graded QDs (ccg-QDs) that feature strong suppression of Auger decay are liquefied using a small amount of solvent. Transient absorption measurements of ccg-QD liquid suspensions reveal broad-band optical gain spanning a wide spectral range from 560 (green) to 675 nm (red). The gain magnitude is sufficient to realize a two-color amplified spontaneous emission (ASE) at 637 and 594 nm due to the band-edge (1S) and the excited-state (1P) transition, respectively. Importantly, the ASE regime is achieved using quasicontinuous excitation with nanosecond pulses. Furthermore, the ASE is highly stable under prolonged excitation, which stands in contrast to traditional dyes that exhibit strong degradation under identical excitation conditions. These observations point toward a considerable potential of high-density ccg-QD suspensions as liquid, dye-like optical gain media that feature readily achievable spectral tunability and stable operation under intense photoexcitation
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|a Journal Article
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|a amplified spontaneous emission
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4 |
|a liquid lasing
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|a multiexciton recombination
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|a optical gain
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4 |
|a quantum dots
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1 |
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|a Du, Jun
|e verfasserin
|4 aut
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1 |
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|a Zhao, Guohui
|e verfasserin
|4 aut
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1 |
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|a Zhang, Boyu
|e verfasserin
|4 aut
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1 |
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|a Livache, Clément
|e verfasserin
|4 aut
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1 |
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|a Ahn, Namyoung
|e verfasserin
|4 aut
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1 |
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|a Jia, Yuxi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Mingrun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chen, Ying
|e verfasserin
|4 aut
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1 |
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|a Zhu, Jingyi
|e verfasserin
|4 aut
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1 |
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|a Guo, Jingwei
|e verfasserin
|4 aut
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1 |
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|a Klimov, Victor I
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wu, Kaifeng
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 7 vom: 25. Feb., Seite e2308979
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:36
|g year:2024
|g number:7
|g day:25
|g month:02
|g pages:e2308979
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|u http://dx.doi.org/10.1002/adma.202308979
|3 Volltext
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