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dc.contributor.authorDelikanli, Savas
dc.contributor.authorIsik, Furkan
dc.contributor.authorDurmusoglu, Emek G.
dc.contributor.authorErdem, Onur
dc.contributor.authorShabani, Farzan
dc.contributor.authorCanimkurbey, Betul
dc.contributor.authorKumar, Satish
dc.date.accessioned2024-03-12T19:29:26Z
dc.date.available2024-03-12T19:29:26Z
dc.date.issued2022
dc.identifier.issn2040-3364
dc.identifier.issn2040-3372
dc.identifier.urihttps://doi.org/10.1039/d2nr03659b
dc.identifier.urihttps://hdl.handle.net/20.500.12450/2309
dc.description.abstractAlthough 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 similar to 3.4 mu J cm(-2) and an ultralong gain lifetime of similar to 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 mu J cm(-2). In addition, we demonstrate a whispering gallery mode laser with a low threshold of similar to 30 mu J cm(-2) obtained by incorporating films of CQWs by exploiting layer-by-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.en_US
dc.description.sponsorshipSingapore National Research Foundation [NRF-NRFI2016-08]; Singapore Agency for Science, Technology and Research (A*STAR) SERC Pharos Program [152-73-00025]; Agency for Science, Technology and Research (A*STAR) MTC program [M21J9B0085]; TUBITAK [119N343, 120N076, 121N395, 20AG001]; TUBA; Ministry of Education Tier 1 (Singapore) [MOE-RG62/20]en_US
dc.description.sponsorshipThe 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. We also thank Dr Seongwoo Yoo and Dr Zhou Yanyan for providing us with pieces of fiber samples. H. V. D. also acknowledges support from TUBA.en_US
dc.language.isoengen_US
dc.publisherRoyal Soc Chemistryen_US
dc.relation.ispartofNanoscaleen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.titleObservation of optical gain from aqueous quantum well heterostructures in wateren_US
dc.typearticleen_US
dc.departmentAmasya Üniversitesien_US
dc.authoridDemir, Hilmi Volkan/0000-0003-1793-112X
dc.authoridDurmusoglu, Emek G./0000-0001-6840-8342
dc.authoridShabani, Farzan/0000-0003-2174-5960
dc.authoridIsik, Furkan/0000-0001-5881-5438
dc.identifier.volume14en_US
dc.identifier.issue40en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.scopus2-s2.0-85139506382en_US
dc.identifier.doi10.1039/d2nr03659b
dc.department-temp[Delikanli, Savas; Durmusoglu, Emek G.; Demir, Hilmi Volkan] Nanyang Technol Univ, Luminous Ctr Excellence Semicond Lighting & Displ, Sch Elect & Elect Engn, Sch Phys & Math Sci,Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore; [Delikanli, Savas; Isik, Furkan; Erdem, Onur; Shabani, Farzan; Canimkurbey, Betul; Kumar, Satish; Baruj, Hamed Dehghanpour; Demir, Hilmi Volkan] Bilkent Univ, UNAM Inst Mat Sci & Nanotechnol, Dept Elect & Elect Engn, Dept Phys, TR-06800 Ankara, Turkey; [Canimkurbey, Betul] Amasya Univ, Serefeddin Hlth Serv Vocat Sch, Cent Res Lab, TR-05100 Amasya, Turkeyen_US
dc.identifier.wosWOS:000854631200001en_US
dc.identifier.pmid36106594en_US
dc.authorwosidDemir, Hilmi Volkan/AAV-2194-2020


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