Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Quantum Sensing and Nano Electronics and Photonics

Femtosecond single photon time-bin detection via up-conversion

Maximilian Hornauer, Yuta Kochi, Tomoyuki Shoji, Sunao Kurimura, Junko Ishi‐Hayase

Published Mar 21, 2025• 0 citations
Publisher
DOI
10.1117/12.3041858

Related papers

Single-photon femtosecond detection by frequency mixing up-conversion optical gate

Paolo Mataloni, Ottavia Jedrkiewicz, F. De Martini

Physics Letters A•Jul 1, 1998•14 citations

Evaluation of Femtosecond Time-bin Qubits Using Frequency Up-conversion Technique

Yuta Kochi, Sunao Kurimura, Junko Ishi‐Hayase

Time-bin qubits, in which quantum information is encoded in a single photon at different times $Δ$t, are suitable for long-distance transmission via optical fibers. However, detection of time-bin qubits has been limited to the nanosecond range owing to the limited temporal resolution of single-photon detectors. In this study, we developed an up-conversion single-photon detector (UCSPD), using commercial nonlinear crystals of different lengths. By changing the crystal length and pump power, we quantitatively evaluated the efficiency and temporal resolution of the UCSPD and determined the optimal conditions for measuring femtosecond time-bin qubits. This detector achieved a temporal resolution of 415 fs and up-conversion efficiency of 10.1 %. Consequently, we successfully evaluated single-photon level pseudo femtosecond time-bin qubits with a pulse interval of only 800 fs.

arXiv:2205.06957•May 14, 2022•2 citations

Single-photon detection and its applications

Yan Liang, Heping Zeng

Science China Physics Mechanics and Astronomy•Apr 15, 2014•34 citations

Evaluation of Femtosecond Time-bin Photon Echo from Quantum Dot Ensemble using Frequency Up-conversion Technique

Yuta Kochi, Yutaro Kinoshita, Sunao Kurimura +2 more

We have succeeded in femtosecond time-bin pulses storage/retrieval by a photon echo method with a quantum dot ensemble. Moreover, we have developed an up-conversion single-photon detector and evaluated the ultraweak femtosecond time-bin echo signal.

•Jan 1, 2023•2 citations

Nonlinear optics for ultrafast single-photon detection

Mario Agio, Duncan G. England, Assegid M. Flatae +2 more

Elsevier eBooks•Jan 1, 2023•3 citations

Ultrafast Measurement of Femtosecond Time-bin Qubits Using Optimized Up-conversion Single Photon Detector

Yuta Kochi, Sunao Kurimura, Junko Ishi‐Hayase

We developed and optimized the up-conversion single photon detector with the temporal resolution of 415 fs. Consequently, we successfully evaluated single-photon level pseudo time-bin qubits with their pulse interval of only 800 fs.

Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)•Jul 31, 2022•0 citations
Time-bin qubits, in which quantum information is encoded in a single photon at different times ΔΔΔt, are suitable for long-distance transmission via optical fibers. However, detection of time-bin qubits has been limited to the nanosecond range owing to the limited temporal resolution of single-photon detectors. In this study, we developed an up-conversion single-photon detector (UCSPD), using commercial nonlinear crystals of different lengths. By changing the crystal length and pump power, we quantitatively evaluated the efficiency and temporal resolution of the UCSPD and determined the optimal conditions for measuring femtosecond time-bin qubits. This detector achieved a temporal resolution of 415 fs and up-conversion efficiency of 10.1 %. Consequently, we successfully evaluated single-photon level pseudo femtosecond time-bin qubits with a pulse interval of only 800 fs.