🌐EnglishEnglishDeutschEspañolFrançaisItalianoPortuguêsРусскийالعربية中文日本語EntityQ231917· pop 14· linked from 59 articlestwo-photon absorptionmultiphoton absorptionAvailable in 14 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةAzerbaijaniConnectionsfluorophoreEntityatomEntityCategoriesNonlinear optics