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9 March 2020 Anti-Stokes photoluminescence and optical cooling of CdSeS/ZnS colloidal quantum dots embedded in dielectric waveguides
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Abstract
Anti-Stokes photoluminescence from colloidal CdSeS/ZnS quantum dots (QDs) is observed. The QDs were inserted into the core of wider-bandgap SiO2/Si3N4/SiO2 structure by thin film deposition and confirmed as promising nanoemitters for laser cooling due to efficient anti-Stokes emission. The nanoemitters were optically pumped by semiconductor lasers coupled to the waveguides using free-space optics. A direct evidence of local optical cooling in the waveguide structure has been demonstrated with a luminescence thermometry based on the detection of photoluminescence signal phase change versus power of the pumping laser, using a lock-in amplifier.
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mark V. Reymatias, Gema J. Alas, Arjun Senthil, Sami A. Nazib, Troy A. Hutchins-Delgado, Hosuk Lee, Shruti I. Gharde, Dominic Bosomtwi, DeYannah J. Walker, Adreanna Rael, Nathan J. Withers, Gennady A. Smolyakov, Alexander Neumann, Yuliya Kuznetsova, Sergei A. Ivanov, Dale L. Huber, and Marek Osiński "Anti-Stokes photoluminescence and optical cooling of CdSeS/ZnS colloidal quantum dots embedded in dielectric waveguides", Proc. SPIE 11298, Photonic Heat Engines: Science and Applications II, 112980P (9 March 2020); https://doi.org/10.1117/12.2550748
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