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2 November 2016 Upconversion nanophotonics (Conference Presentation)
Shuang Fang Lim, Janina Wirth, Kory Green, Megan O'Connor
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Proceedings Volume 9956, Ultrafast Nonlinear Imaging and Spectroscopy IV; 99560G (2016) https://doi.org/10.1117/12.2238583
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States
Abstract
Infrared excited and visible emitting upconverting nanoparticles show potential applications in the fields of photovoltaics, and in single molecule bio-imaging. We show enhanced upconversion luminescence, of up to 50-fold, at the single particle level, via subwavelength interference of the infrared excitation and visible emission. Single particle upconverted spectra and time-resolved decay, correlated with AFM, show enhanced emission at 545nm and 650 nm, whereby the magnitude of the enhancement is dependent on the thickness of the interference layer, and on the excitation intensity. We correlate our experimental results with finite element modeling showing both enhanced excitation and emission as a function of the interference layer thickness.
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Shuang Fang Lim, Janina Wirth, Kory Green, and Megan O'Connor "Upconversion nanophotonics (Conference Presentation)", Proc. SPIE 9956, Ultrafast Nonlinear Imaging and Spectroscopy IV, 99560G (2 November 2016); https://doi.org/10.1117/12.2238583
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KEYWORDS
Upconversion
Atmospheric particles
Infrared radiation
Nanophotonics
Visible radiation
Imaging spectroscopy
Luminescence
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