EntityQ7187864· pop 7· linked from 26 articlesphoton upconversionSign in to saveprocess in which the sequential absorption of two or more photons leads to the emission of light at shorter wavelength than the excitation wavelengthConnectionslightEntitylanthanideEntityblockEntityoxygenEntitytitaniumEntityInternational Standard Book NumberEntitynickelEntitymolybdenumEntityosmiumEntityrheniumEntityinfrared radiationEntityphotonEntitydigital object identifierEntitywavelengthEntitysolar cellEntityNicolaas BloembergenEntityblack bodyEntityQ180686EntityfluorescenceEntitybibcodeEntityCategoriesLightQuantum optics