[15p-K309-1~12] 3.9 Optical quantum physics and technologies

1:45 PM - 2:00 PM JST(4:45 AM - 5:00 AM UTC)

[15p-K309-2] Narrowband correlated photon pair generation using high-Q Si micro-ring resonators

〇(DC)Shouichirou Yasui^1,2, Tomohiro Inaba¹, Hidetaka Nishi^3,4, Reina Kaji², Satoru Adachi², Xuejun Xu¹, Haruki Sanada¹ (1.NTT Basic Research Labs., 2.Grad. Sch. Eng., Hokkaido Univ., 3.NTT Device Technology Labs., 4.NTT Nanophotonics Center)

Keywords:

microring resonator,Optical quantum memory,Correlated photon pair source

To realize a quantum repeater, optical quantum memories (QM) and entangled photon pair sources are being actively researched. We are aiming to develop a entangled photon pair source that can be applied to a QM using a rare-earth ion-doped crystal with a narrow photon acceptance bandwidth (<400 MHz). In this study, we optimized the Si micro-ring resonator structure to narrow the photon pair spectrum bandwidth. As a result, we achieved a resonator with a Q value of 800,000, and the bandwidth of the generated photon pairs was 265 MHz, which is applicable to QMs.