Ultralow threshold one-photon-and two-photon-pumped optical gain media of blue-emitting colloidal quantum dot films

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buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage2218en_US
dc.citation.issueNumber13en_US
dc.citation.spage2214en_US
dc.citation.volumeNumber5en_US
dc.contributor.authorGuzelturk, B.en_US
dc.contributor.authorKelestemur, Y.en_US
dc.contributor.authorAkgul, M. Z.en_US
dc.contributor.authorSharma, V. K.en_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.date.accessioned2015-07-28T12:05:20Z
dc.date.available2015-07-28T12:05:20Z
dc.date.issued2014en_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractColloidal quantum dots (QDs) offer advantageous properties as an optical gain media for lasers. Optical gain in the QDs has been shown in the whole visible spectrum, yet it has been intrinsically challenging to realize efficient amplified spontaneous emission (ASE) and lasing in the blue region of the visible spectrum. Here, we synthesize large-sized core/gradient shell CdZnS/ZnS QDs as an efficient optical gain media in the blue spectral range. In this Letter, we demonstrate for the first time that two-photon-absorption-pumped ASE from the blue-emitting QD is achievable with a threshold as low as 6 mJ/cm(2). Utilizing these QDs, we also report one-photon-absorption-pumped ASE at an ultralow threshold of similar to 60 mu J/cm(2), which is comparable to the state-of-the-art red-emitting QD-based gain media. This one-photon-pumped ASE threshold is an order of magnitude better than that of the previously reported best blue-emitting QD-based gain media.en_US
dc.description.provenanceMade available in DSpace on 2015-07-28T12:05:20Z (GMT). No. of bitstreams: 1 10.1021-jz500726h.pdf: 2323408 bytes, checksum: 534a0ad91df73b654b50c408ff6f27ac (MD5)en
dc.identifier.doi10.1021/jz500726hen_US
dc.identifier.issn1948-7185
dc.identifier.urihttp://hdl.handle.net/11693/13237
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/jz500726hen_US
dc.source.titleJournal of Physical Chemistry Lettersen_US
dc.subjectAmplified Spontaneous Emissionen_US
dc.subjectSemiconductor Nanocrystalsen_US
dc.subjectStimulated-emissionen_US
dc.subjectHighly Efficienten_US
dc.subjectWave-guidesen_US
dc.titleUltralow threshold one-photon-and two-photon-pumped optical gain media of blue-emitting colloidal quantum dot filmsen_US
dc.typeArticleen_US

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