The role of delay times in subcycle-resolved probe retardation measurements |
| |
Affiliation: | 1. College of Science, Xian University of Science and Technology, Xian 710054, Shaanxi, PR China;2. Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Northwestern Polytechnical University, Xian 710129, Shaanxi, PR China;1. Functional Materials Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630006, India;2. Department of Physics, The American College, Madurai 625002, India;1. Shahrekord University of medical Sciences, Shahrekord, Iran;2. Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, Iran;3. Mechanical Engineering Group, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran;4. Physics Department, Shiraz University, Shiraz 71454, Iran;1. Key Laboratory of Modern Acoustics, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China;2. Department of Physics, Nanjing University, Nanjing 210093, China;3. Department of Physics, School of Science, Linyi University, Linyi 276005, China;4. Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 210093, China;5. State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, CAS, Beijing 100190, China;1. Fachgebiet Strömungslehre und Aerodynamik, TU Darmstadt, Alarich-Weiss-Straße 10, 64287 Darmstadt, Germany;2. Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany |
| |
Abstract: | The delay in the nonlinear response of matter to intense laser pulses has been studied since a long time regarding its nuclear contribution. In contrast, the electronic part of the nonlinear response in wide-band-gap dielectrics, which is usually dominant, is not well explored regarding its delay, and previous studies have revealed that the timescale is below 1 fs. Here, the influence of delay times on the recently introduced method of subcycle-resolved probe retardation measurements is investigated using a simulation. In the model assumed, the electronic nonlinearity is divided into the third order Kerr effect and the plasma contribution due to conduction band population in the strong laser field. In the regime of close-to-collinear pump-probe geometries, the probe retardation shows both π- and 2π-oscillations in the pump-probe delay. Sub-femtosecond delay times influence the phase of the oscillations significantly, but it remains difficult to distinguish the influence of the Kerr response from the plasma contribution. |
| |
Keywords: | Subcycle nonlinear optics Strong-field physics Photoemission delays |
本文献已被 ScienceDirect 等数据库收录! |
|