Unraveling the ultralow threshold stimulated emission from CdZnS/ZnS quantum dot and enabling high ‐ Q microlasers

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buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage516en_US
dc.citation.issueNumber5en_US
dc.citation.spage507en_US
dc.citation.volumeNumber9en_US
dc.contributor.authorWang Y.en_US
dc.contributor.authorFong, K. E.en_US
dc.contributor.authorYang, S.en_US
dc.contributor.authorTa, V.en_US
dc.contributor.authorGao, Y.en_US
dc.contributor.authorWang, Z.en_US
dc.contributor.authorNalla, V.en_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.contributor.authorSun, H.en_US
dc.date.accessioned2016-02-08T10:13:54Z
dc.date.available2016-02-08T10:13:54Z
dc.date.issued2015en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractThe newly engineered ternary CdZnS/ZnS colloidal quantum dots (CQDs) are found to exhibit remarkably high photoluminescence quantum yield and excellent optical gain properties. However, the underlying mechanisms, which could offer the guidelines for devising CQDs for optimized photonic devices, remain undisclosed. In this work, through comprehensive steady-state and time-resolved spectroscopy studies on a series of CdZnS-based CQDs, we unambiguously clarify that CdZnS-based CQDs are inherently superior optical gain media in the blue spectral range due to the slow Auger process and that the ultralow threshold stimulated emission is enabled by surface/interface engineering. Furthermore, external cavity-free high-Q quasitoroid microlasers were produced from self-assembly of CdZnS/ZnS CQDs by facile inkjet printing technique. Detailed spectroscopy analysis confirms the whispering gallery mode lasing mechanism of the quasitoroid microlasers. This tempting microlaser fabrication method should be applicable to other solution-processed gain materials, which could trigger broad research interests. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA.en_US
dc.identifier.doi10.1002/lpor.201500063en_US
dc.identifier.issn1863-8880
dc.identifier.urihttp://hdl.handle.net/11693/23436
dc.language.isoEnglishen_US
dc.publisherWiley-VCH Verlagen_US
dc.relation.isversionofhttp://dx.doi.org/10.1002/lpor.201500063en_US
dc.source.titleLaser and Photonics Reviewsen_US
dc.subjectAuger recombinationen_US
dc.subjectCdZnS/ZnS quantum dotsen_US
dc.subjectMultiphoton excitationen_US
dc.subjectStimulated emissionen_US
dc.subjectToroid laseren_US
dc.subjectAugersen_US
dc.subjectInk jet printingen_US
dc.subjectLaser excitationen_US
dc.subjectLaser spectroscopyen_US
dc.subjectMultiphoton processesen_US
dc.subjectNanocrystalsen_US
dc.subjectNeodymium lasersen_US
dc.subjectOptical emission spectroscopyen_US
dc.subjectOptical gainen_US
dc.subjectOptical propertiesen_US
dc.subjectPhotonic devicesen_US
dc.subjectSelf assemblyen_US
dc.subjectSemiconductor quantum dotsen_US
dc.subjectStimulated emissionen_US
dc.subjectWhispering gallery modesen_US
dc.subjectAuger recombinationen_US
dc.subjectColloidal quantum dotsen_US
dc.subjectMultiphoton excitationen_US
dc.subjectOptical gain propertiesen_US
dc.subjectPhotoluminescence quantum yieldsen_US
dc.subjectTime-resolved spectroscopyen_US
dc.subjectUltra - low thresholden_US
dc.subjectWhispering - gallery - mode lasingen_US
dc.subjectQuantum dot lasersen_US
dc.titleUnraveling the ultralow threshold stimulated emission from CdZnS/ZnS quantum dot and enabling high ‐ Q microlasersen_US
dc.typeArticleen_US

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Department of Electrical and Electronics Engineering
Department of Physics
Institute of Materials Science and Nanotechnology (UNAM)