Observation of optical gain from aqueous quantum well heterostructures in water

Although achieving optical gain using aqueous solutions of colloidal nanocrystals as a gain medium is exceptionally beneficial for bio-optoelectronic applications, the realization of optical gain in an aqueous medium using solution-processed nanocrystals has been extremely challenging because of th...

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Main Authors: Delikanli, Savas, Işık, Furkan, Durmusoglu, Emek Goksu, Erdem, Onur, Shabani, Farzan, Canımkurbey, Betül, Kumar, Satish, Baruj, Hamed Dehghanpour, Demir, Hilmi Volkan
Other Authors: School of Electrical and Electronic Engineering
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Language:English
Published: 2023
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Online Access:https://hdl.handle.net/10356/165210
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spelling sg-ntu-dr.10356-1652102023-04-14T15:41:16Z Observation of optical gain from aqueous quantum well heterostructures in water Delikanli, Savas Işık, Furkan Durmusoglu, Emek Goksu Erdem, Onur Shabani, Farzan Canımkurbey, Betül Kumar, Satish Baruj, Hamed Dehghanpour Demir, Hilmi Volkan School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences Luminous! Center of Excellence for Semiconductor Lighting and Displays Engineering::Materials::Nanostructured materials Aqueous Media Colloidal Nanocrystals Although achieving optical gain using aqueous solutions of colloidal nanocrystals as a gain medium is exceptionally beneficial for bio-optoelectronic applications, the realization of optical gain in an aqueous medium using solution-processed nanocrystals has been extremely challenging because of the need for surface modification to make nanocrystals water dispersible while still maintaining their gain. Here, we present the achievement of optical gain in an aqueous medium using an advanced architecture of CdSe/CdS@CdxZn1−xS core/crown@gradient-alloyed shell colloidal quantum wells (CQWs) with an ultralow threshold of ∼3.4 µJ cm−2 and an ultralong gain lifetime of ∼2.6 ns. This demonstration of optical gain in an aqueous medium is a result of the carefully heterostructured CQWs having large absorption cross-section and gain cross-section in addition to inherently slow Auger recombination in these CQWs. Furthermore, we show low-threshold in-water amplified spontaneous emission (ASE) from these aqueous CQWs with a threshold of 120 µJ cm−2 In addition, we demonstrate a whispering gallery mode laser with a low threshold of ∼30 µJ cm−2 obtained by incorporating films of CQWs by exploiting layerby-layer approach on a fiber. The observation of low-threshold optical gain with ultralong gain lifetime presents a significant step toward the realization of advanced optofluidic colloidal lasers and their continuous-wave pumping. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) National Research Foundation (NRF) Submitted/Accepted version The authors gratefully acknowledge the financial support in part from Singapore National Research Foundation under the programs of NRF-NRFI2016-08, the Science and the Singapore Agency for Science, Technology and Research (A*STAR) SERC Pharos Program under grant number 152-73-00025 and Agency for Science, Technology and Research (A*STAR) MTC program under grant number M21J9B0085, Ministry of Education Tier 1 under grant number MOE-RG62/20 (Singapore), and in part from TUBITAK 119N343, 120N076, 121N395 and 20AG001. 2023-04-13T02:22:19Z 2023-04-13T02:22:19Z 2022 Journal Article Delikanli, S., Işık, F., Durmusoglu, E. G., Erdem, O., Shabani, F., Canımkurbey, B., Kumar, S., Baruj, H. D. & Demir, H. V. (2022). Observation of optical gain from aqueous quantum well heterostructures in water. Nanoscale, 14(40), 14895-14901. https://dx.doi.org/10.1039/d2nr03659b 2040-3364 https://hdl.handle.net/10356/165210 10.1039/d2nr03659b 14 2-s2.0-85139506382 40 14 14895 14901 en NRF-NRFI2016-08 SERC-152-3-00025 M21J9B0085 MOE-RG62/20 Nanoscale © 2022 The Royal Society of Chemistry. All rights reserved. This paper was published in Nanoscale and is made available with permission of The Royal Society of Chemistry. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials::Nanostructured materials
Aqueous Media
Colloidal Nanocrystals
spellingShingle Engineering::Materials::Nanostructured materials
Aqueous Media
Colloidal Nanocrystals
Delikanli, Savas
Işık, Furkan
Durmusoglu, Emek Goksu
Erdem, Onur
Shabani, Farzan
Canımkurbey, Betül
Kumar, Satish
Baruj, Hamed Dehghanpour
Demir, Hilmi Volkan
Observation of optical gain from aqueous quantum well heterostructures in water
description Although achieving optical gain using aqueous solutions of colloidal nanocrystals as a gain medium is exceptionally beneficial for bio-optoelectronic applications, the realization of optical gain in an aqueous medium using solution-processed nanocrystals has been extremely challenging because of the need for surface modification to make nanocrystals water dispersible while still maintaining their gain. Here, we present the achievement of optical gain in an aqueous medium using an advanced architecture of CdSe/CdS@CdxZn1−xS core/crown@gradient-alloyed shell colloidal quantum wells (CQWs) with an ultralow threshold of ∼3.4 µJ cm−2 and an ultralong gain lifetime of ∼2.6 ns. This demonstration of optical gain in an aqueous medium is a result of the carefully heterostructured CQWs having large absorption cross-section and gain cross-section in addition to inherently slow Auger recombination in these CQWs. Furthermore, we show low-threshold in-water amplified spontaneous emission (ASE) from these aqueous CQWs with a threshold of 120 µJ cm−2 In addition, we demonstrate a whispering gallery mode laser with a low threshold of ∼30 µJ cm−2 obtained by incorporating films of CQWs by exploiting layerby-layer approach on a fiber. The observation of low-threshold optical gain with ultralong gain lifetime presents a significant step toward the realization of advanced optofluidic colloidal lasers and their continuous-wave pumping.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Delikanli, Savas
Işık, Furkan
Durmusoglu, Emek Goksu
Erdem, Onur
Shabani, Farzan
Canımkurbey, Betül
Kumar, Satish
Baruj, Hamed Dehghanpour
Demir, Hilmi Volkan
format Article
author Delikanli, Savas
Işık, Furkan
Durmusoglu, Emek Goksu
Erdem, Onur
Shabani, Farzan
Canımkurbey, Betül
Kumar, Satish
Baruj, Hamed Dehghanpour
Demir, Hilmi Volkan
author_sort Delikanli, Savas
title Observation of optical gain from aqueous quantum well heterostructures in water
title_short Observation of optical gain from aqueous quantum well heterostructures in water
title_full Observation of optical gain from aqueous quantum well heterostructures in water
title_fullStr Observation of optical gain from aqueous quantum well heterostructures in water
title_full_unstemmed Observation of optical gain from aqueous quantum well heterostructures in water
title_sort observation of optical gain from aqueous quantum well heterostructures in water
publishDate 2023
url https://hdl.handle.net/10356/165210
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