multiphoton       
adjective  physics specialized (also multi-photon) uk/ˌmʌl.tiˈfəʊ.tɒn/ us/ˌmʌl.tiˈfoʊ.tɑːn/ /ˌmʌl.taɪˈfoʊ.tɑːn/
 多光子的
involving several photons (= single units of light)
  Researchers used multiphoton microscopy for the procedure.
 Non-linear effects like multi-photon absorption can sometimes occur. 非线性效应如多光子吸收有时是会发生的。 
 - More examples
 - They used the money to build the region's first multi-photon confocal microscope.
 - At lower intensities, multiphoton ionization occurs when an atom absorbs the minimum number of electrons necessary to reach the first ionization threshold.
 - Any hope for a bleaching in the usual sense is not possible unless multiphoton processes could be considered.