32 results about "Photon upconversion" patented technology

Provided are a novel solid-based upconversion film having high emission efficiency and a method for producing the upconversion film. An upconversion film according to the present invention is a stretched film formed of a composition at least including an acceptor, a donor, and a matrix resin, wherein the matrix resin is a poly(vinyl alcohol)-based resin, and the matrix resin is oriented by stretching. A method for producing an upconversion film according to the present invention is a method for producing a photon upconversion film including a step of stretching a composition at least including an acceptor, a donor, and a matrix resin, wherein the matrix resin is a poly(vinyl alcohol)-based resin, and the stretching is wet-stretching in an aqueous solution of boric acid.

The present disclosure relates to luminescent including photon up-conversion nanoparticles. These nanoparticles include a polymeric organic matrix, at least one light emitter distributed within this matrix, a stabilizing agent, and at least one metal particle enclosed within the matrix, wherein the metal particles are plasmonic nanoparticles. The present disclosure further relates to methods of manufacture and to uses of such nanoparticles.

There is provided an optical wavelength conversion element with a good temporal stability and such a high optical wavelength conversion efficiency that the element is viable even under sunlight or similar, low intensity light. Owing to these properties, the element is suited for use in solar cells, photocatalysts, photocatalytic hydrogen and oxygen generating devices, photon upconversion filters, and like articles. The optical wavelength conversion element is visually homogeneous and transparent and produced by dissolving and / or dispersing in an ionic liquid (C) a combination of organic photosensitizing molecules (A) and organic light-emitting molecules (B) that exhibits triplet-triplet annihilation. The organic photosensitizing molecules (A) have either an only one local maximum absorption wavelength or a plurality of local maximum absorption wavelengths, and either the single local maximum absorption wavelength or a maximum one of the plurality of local maximum absorption wavelengths is from 250 nm to 499 nm.

The invention discloses a category of heterofluorene derivatives with strong two photon absorption character characterized in that, it is prepared from the symmetrical conjugation molecular by using the heterocyclic fluorine as the center of symmetry, wherein the hetero atoms in the heterocyclic fluorine are selected from S, O or N, and N atom has straight chain or branched chain alkyl, the elementary oxdiazole with electron suction capability is selected as the branch to construct conjugation multiple branch molecular material.

The invention discloses a photon upconversion method and system based on microwave frequency quadruplication and belongs to the field of microwave photonics. Optical carriers generated by a laser areinput into a first double-parallel Mach-Zehnder modulator. An upper arm submodulator is modulated through utilization of local oscillator signals. Through adjustment of direct current bias of the modulator, the modulator is enabled to work a carrier suppressed maximum transmission point. Modulated optical signals enter a fiber bragg grating through an optical circulator. Through utilization of wavelength selectivity of the fiber bragg grating, positive second-order optical sidebands of a local oscillator are transmitted and are taken as carriers to enter a second double-parallel Mach-Zehnder modulator. Negative second-order optical sidebands of the local oscillator are reflected and are collected through utilization of the optical circulator. Intermediate frequency signals are loaded to the second double-parallel Mach-Zehnder modulator through utilization of a 90-dgree electric bridge, and carrier suppressed single-sideband modulation is realized through utilization of the direct current bias. Two optical paths are combined, power amplification is carried out on the optical signals, and insertion losses of the modulator are compensated. Frequency beating is carried out through utilization of a photoelectric detector, thereby obtaining frequency quadruplicated upconversion signals.

The invention relates to an ultra-strong multi-photon up-conversion nanocrystalline for super-resolution imaging. The ultra-strong multi-photon up-conversion nanocrystalline for super-resolution imaging is a hexagonal crystal monodisperse sodium yttrium tetrafluoro nanocrystalline with the average grain diameter of 20-50nm and rare earth ytterbium ions and thulium ions are co-doped in the nanocrystalline. The molar dosage concentration of ytterbium ions is 10-49% while the molar dosage concentration of thulium ions is 0.1-2%. The ultra-strong multi-photon up-conversion nanocrystalline for super-resolution imaging provided by the invention has the advantages that the monodisperse sodium yttrium tetrafluoro nanocrystalline which is prepared by way of nucleation / growth separation, rare earth ion type selection and dosage concentration regulating method has the characteristics of being uniform and controllable in side and shape, capable of generating ultra-strong multi-photon up-conversion luminescence and suitable for super-resolution imaging.