The following seminar was held.
Date and Time: October 9, 2025 (Thu.) 13:00-14:30
Venue: 340, Building 1, Faculty of Science, The University of Tokyo
Speaker: Herve Rigneault (Full Professsor and CNRS research Director, Institut Fresnel, Aix-Marseille University)
Title: Coherent Raman imaging in the time and frequency domains
In this seminar, I will present coherent Raman techniques in both the time and frequency domains.Time-domain coherent Raman can probe low vibrational frequencies using a short excitation pulse that drives the molecular vibration, followed by a time-delayed probe pulse that measures the transient vibrational refractive index through frequency shifts. Using an ultrafast acousto-optic delay line, I will demonstrate that low-frequency hyperspectral Raman imaging is possible at 6 frames per second over a 200 μm field of view. I will also present recent results obtained with temporally shaped pump and probe pulses, which can be used to selectively enhance or suppress vibrational excitations.
In the second part of the seminar, I will discuss our recent advances in frequency-domain coherent Raman for chemical imaging of high vibrational frequencies. I will show how narrowband coherent Raman can be used to perform histology with a quality comparable to classical paraffin-embedded histology performed in hospitals. I will also present our recent work on implementing nonlinear imaging in flexible endoscopes using novel hollow-core fibers.
Language: English
Host Professor: Takuro Ideguchi
Contact: seminar-office@utripl.u-tokyo.ac.jp
Note:
Please complete your registration through the Google Form below.
https://forms.gle/iFAq7Dkn7NW36W8U9
The Zoom link will be sent to your registered email address prior to the event.
This seminar is open to the public. Participants are kindly requested to provide their name, affiliation, and email address upon registration.