On the morning of December 14, 2023, Professor Oren Cohen from the Department of Physics, Technion – Israel Institute of Technology visited the Wuhan National Laboratory for Optoelectronics (WNLO), upon the invitation of Professor Zhu Xiaosong. Professor Cohen was the guest speaker for the 201st Wuhan Optoelectronics Forum and delivered a lecture titled Structured Light and Structured Noise in High Harmonic Generation.
To commence the event, Professor Zhu Xiaosong gave an introduction, highlighting Professor Cohen's research focus and academic contributions. Subsequently, Professor Lan Pengfei presented him with a forum medal, marking the official commencement of the lecture.
Professor Cohen started his talk by introducing their comprehensive theory of nonlinear optical selection rules, which considers the dynamic symmetry of light and the medium, discussing scenarios where symmetry is partially broken. Building upon this theoretical framework, they developed a set of ultrafast chiral detection methods based on dipole interactions. Following this, Professor Cohen delved into the impact of adjusting the quantum noise structure of the driving pulse on the generation of high harmonic spectra and related attosecond pulses. These works, rooted in a novel and potent force known as photon correlation, are expected to play a central role in the emerging field of extreme nonlinear quantum optics.
The atmosphere during the presentation was vibrant, with active participation from researchers and students engaging in enthusiastic discussions with Professor Cohen.
Professor Oren Cohen is a professor at the Department of Physics, Technion – Israel Institute of Technology, and head of the physics program in Guangdong Technion in Shantou, China. He completed his PhD at the Technion in 2004 on optical spatial solitons and shifted to ultrafast optics during his post-doc period in JILA, University of Colorado at Boulder. His current research topics include high harmonic generation, single-shot ultrahigh-speed imaging, selection rules in nonlinear optics, femto-magnetism, optical quantum aspects in high-field physics, ultrafast diagnostics of chirality, and diagnostics of ultrashort laser pulses
