[18a-S4_203-1~7] 3.9 Optical quantum physics and technologies

10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[18a-S4_203-7] Measurement of femtosecond spatially multiplexed single-photon pulses via frequency up-conversion

〇(B)Rei Ishihara¹, Yuta Kochi^1,2, Ryo Tamaki^1,2, Sunao Kurimura³, Keitaro Shimada⁴, Keiichi Nakagawa⁴, Junko Ishi-Hayase^1,2 (1.Keio Univ., 2.Keio CSRN, 3.NIMS, 4.The Univ. of Tokyo)

Keywords:

single-photon,nonlinear optics,femtosecond measurement

Single-photon detection is essential in quantum communication and condensed matter measurements, and in recent years, higher temporal resolution and spatial multiplexing have been actively pursued to increase information density. However, achieving both femtosecond temporal resolution and spatial multiplexing has remained challenging. In this study, we combine a frequency up-conversion single-photon detector with femtosecond temporal resolution, developed by our group, with a burst pulse shaping technique that enables precise control of temporal spacing in the femtosecond regime while maintaining high focusing performance. This approach realizes the measurement of spatially multiplexed single-photon pulses in the femtosecond regime.