| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1533740 | Optics Communications | 2015 | 5 Pages |
•Two-photon interference with non-identical photons is studied based on the superposition principle in Feynman's path integral theory.•The second-order temporal beating between laser and pseudothermal light beams is reported.•The method to observe two-photon interference with photons of different colors is suggested.
Two-photon interference with non-identical photons is studied based on the superposition principle in Feynman's path integral theory. The second-order temporal interference pattern is observed by superposing laser and pseudothermal light beams with different spectra. The reason why there is two-photon interference for photons of different spectra is that non-identical photons can be indistinguishable for the detection system when Heisenberg's uncertainty principle is taken into account. These studies are helpful to understand the second-order interference of light in the language of photons.
