3:15 PM - 3:30 PM [20p-W541-6] 53 % Single-photon detection efficiency at 1550 nm using a sinusoidally gated InGaAs/InP avalanche photodiode 〇(M2)Akiko Tada1, Naoto Namekata1, Shuichiro Inoue1 (1.Nihon Univ.)