[10p-Z21-1~15] 3.10 Optical quantum physics and technologies

[10p-Z21-5] Study on the spatial separation of entangled photon pairs in the same spatial mode

〇Yuki Kamei¹, Bo Cao¹, Ryo Okamoto^1,2, Shigeki Takeuchi¹ (1.Kyoto Univ., 2.JST PRESTO)

Keywords:Two photon interference, parametric down conversion

Quantum entangled photon pair sources are indispensable for photonic quantum technologies: quantum information processing and metrology.
For these applications, the sources are sometimes required to generate photon pairs into different spatial modes.
On the other hand, some of the integrated photon pair sources can generate
photon pairs only into the same spatial mode.
Here, we report the demonstration to separate the generated photon
pairs in the same spatial modes into different spatial modes, by combining two photon pair sources in a two-photon interferometer.