University of Pécs, Hungary
摘要：
The emergence of laser-driven intense terahertz (THz) sources more than 15 years ago marked the birth of nonlinear THz spectroscopy and enabled the study of strong-field interactions. Such experiments demand advanced instrumentation, relying on lasers up to joule-class pulse energies, 100-W power levels, or mid-infrared wavelengths. Powerful pump–probe schemes often face competing requirements, making it challenging to efficiently generate synchronized THz and optical pulses with the desired wavelength.
At the ELI ALPS user facility, versatile multicolor schemes—with intense pulses from XUV to THz—are now available to the scientific community. In this seminar, I will introduce the strong-field THz capabilities at ELI ALPS, review developments in THz sources and pump–probe methods, and present selected applications. Optical-rectification sources based on lithium niobate, semiconductors, and organic nonlinear crystals can be tailored for spectral shaping, temporal waveform control, or optimization to specific driver lasers. Nonlinear THz spectroscopy and THz control provide unique insight into material responses under strong fields, with implications for functional devices, while biomedical applications may enable novel therapies. Examples from the ELI ALPS user programme will highlight these opportunities.
简介:
József András Fülöp obtained his PhD degree in 2003 from University of Szeged, Hungary and then worked as a postdoctoral researcher in Munich, Germany at the Ludwig-Maximilans-Universität and the Max Planck Institute of Quantum Optics. In 2007, he joined the University of Pécs, Hungary, where he was appointed as a full professor in 2020. In 2021, he took a full-time position at the ALPS Facility of the Extreme Light Infrastructure ERIC in Szeged, Hungary, where now he is heading the Terahertz Sources Group as a leading scientist. His current work focuses on THz nonlinear spectroscopy and strong-field interactions.
地点：中科院物理所D206会议室
邀请人：李玉同 研究员（Tel：82648014）
主办单位：中国科学院光物理重点实验室