![Upconversion, explained by RP Photonics Encyclopedia; photons, gain medium, laser, fluorescence, energy transfer, cooperative upconversion, excited-state absorption Upconversion, explained by RP Photonics Encyclopedia; photons, gain medium, laser, fluorescence, energy transfer, cooperative upconversion, excited-state absorption](https://www.rp-photonics.com/previews/upconversion.png)
Upconversion, explained by RP Photonics Encyclopedia; photons, gain medium, laser, fluorescence, energy transfer, cooperative upconversion, excited-state absorption
![Controlled Assembly of Upconverting Nanoparticles for Low-Threshold Microlasers and Their Imaging in Scattering Media | ACS Nano Controlled Assembly of Upconverting Nanoparticles for Low-Threshold Microlasers and Their Imaging in Scattering Media | ACS Nano](https://pubs.acs.org/cms/10.1021/acsnano.9b06102/asset/images/medium/nn9b06102_0006.gif)
Controlled Assembly of Upconverting Nanoparticles for Low-Threshold Microlasers and Their Imaging in Scattering Media | ACS Nano
Multicolor tunable luminescence and laser-sensitization induced upconversion enhancement in Ln-doped Gd2O3 crystals for anti-counterfeiting - Materials Chemistry Frontiers (RSC Publishing)
Near-Infrared Laser-Triggered Full-Color Tuning Photon Upconversion and Intense White Emission in Single Gd2O3 Microparticle | ACS Sustainable Chemistry & Engineering
![Ratiometric upconversion nanothermometry with dual emission at the same wavelength decoded via a time-resolved technique | Nature Communications Ratiometric upconversion nanothermometry with dual emission at the same wavelength decoded via a time-resolved technique | Nature Communications](https://media.springernature.com/lw685/springer-static/image/art%3A10.1038%2Fs41467-019-13796-w/MediaObjects/41467_2019_13796_Fig1_HTML.png)
Ratiometric upconversion nanothermometry with dual emission at the same wavelength decoded via a time-resolved technique | Nature Communications
![Rosenthal Lab on Twitter: "InP/ZnSe quantum dots under excitation in fluorescence upconversion experiment #fluorescencefriday #sciencefriday #quantumdots #QDs #vuchem #fluorescence #vanderbilt #science #realtimechem # upconversion #laser #lasers ... Rosenthal Lab on Twitter: "InP/ZnSe quantum dots under excitation in fluorescence upconversion experiment #fluorescencefriday #sciencefriday #quantumdots #QDs #vuchem #fluorescence #vanderbilt #science #realtimechem # upconversion #laser #lasers ...](https://pbs.twimg.com/media/D2RdwqlWwAAubmr.jpg:large)
Rosenthal Lab on Twitter: "InP/ZnSe quantum dots under excitation in fluorescence upconversion experiment #fluorescencefriday #sciencefriday #quantumdots #QDs #vuchem #fluorescence #vanderbilt #science #realtimechem # upconversion #laser #lasers ...
Upconversion luminescence from aluminoborate glasses doped with Tb3+, Eu3+ and Dy3+ under the excitation of 2.6-μm femtosecond laser pulses
![800 nm laser induced white light upconversion of Nd/Yb/Pr triply doped NaYF4 through a dual-sensitization strategy - ScienceDirect 800 nm laser induced white light upconversion of Nd/Yb/Pr triply doped NaYF4 through a dual-sensitization strategy - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0025540820315087-ga1.jpg)
800 nm laser induced white light upconversion of Nd/Yb/Pr triply doped NaYF4 through a dual-sensitization strategy - ScienceDirect
![Generating ultra-violet lasers with near-infrared light through 'domino upconversion' of nanoparticles — Nano Magazine - Latest Nanotechnology News Generating ultra-violet lasers with near-infrared light through 'domino upconversion' of nanoparticles — Nano Magazine - Latest Nanotechnology News](https://images.squarespace-cdn.com/content/v1/57ed3edb37c58182f815c65f/1653035012586-8CS4STE91FB1Z6FZARUY/shutterstock_1714464277.jpg?format=1500w)
Generating ultra-violet lasers with near-infrared light through 'domino upconversion' of nanoparticles — Nano Magazine - Latest Nanotechnology News
NIR laser scanning microscopy for photophysical characterization of upconversion nanoparticles and nanohybrids - Nanoscale (RSC Publishing)
![a) Upconversion emission under 980 nm diode laser excitation. (b) Pump... | Download Scientific Diagram a) Upconversion emission under 980 nm diode laser excitation. (b) Pump... | Download Scientific Diagram](https://www.researchgate.net/profile/Manoj-Kumar-Mahata/publication/309616942/figure/fig3/AS:424277376802819@1478167017499/a-Upconversion-emission-under-980-nm-diode-laser-excitation-b-Pump-power-dependent.png)
a) Upconversion emission under 980 nm diode laser excitation. (b) Pump... | Download Scientific Diagram
![Upconversion effects on the performance of near-infrared laser-driven polymer photovoltaic devices - ScienceDirect Upconversion effects on the performance of near-infrared laser-driven polymer photovoltaic devices - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S1566119912002704-fx1.jpg)
Upconversion effects on the performance of near-infrared laser-driven polymer photovoltaic devices - ScienceDirect
![Generating ultra-violet lasers with near-infrared light through 'domino upconversion' of nanoparticles Generating ultra-violet lasers with near-infrared light through 'domino upconversion' of nanoparticles](https://scx2.b-cdn.net/gfx/news/2022/generating-ultra-viole.jpg)
Generating ultra-violet lasers with near-infrared light through 'domino upconversion' of nanoparticles
![a) Upconversion mechanism of the nanostructure excited using an 808 nm... | Download Scientific Diagram a) Upconversion mechanism of the nanostructure excited using an 808 nm... | Download Scientific Diagram](https://www.researchgate.net/profile/Bin-Xue-7/publication/267760358/figure/fig1/AS:359005403795456@1462604966367/a-Upconversion-mechanism-of-the-nanostructure-excited-using-an-808-nm-laser-b-NIR.png)