Ekkarat PongophasWatthana SriklinAsawin SinsarpSujin SuwannaWithoon ChunwachirasiriWisit SinghsomrojeMahidol University2018-12-112019-03-142018-12-112019-03-142016-01-01Journal of Nanophotonics. Vol.10, No.1 (2016)193426082-s2.0-84960959350https://repository.li.mahidol.ac.th/handle/20.500.14594/40933© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). We investigate the interference of two photons in an optical gating Michelson interferometer. The phenomenon is studied using two different representations of photons: the space-time domain and a step-by-step two-photon state evolution. Both representations lead to identical results. The evolution analysis describes the result by the interference of four two-photon traveling states, whereas the space-time domain analysis reveals that the classical interference of the high-intensity light source is identical to two-photon interference in the quantum regime, except for a multiplicative factor of (n2), where n is the number of photons.Mahidol UniversityMaterials ScienceArticleSCOPUS10.1117/1.JNP.10.016013