[19p-C43-1~15] 4.7 Quantum Optics, Nonlinear Optics and Structured Optics

3:15 PM - 3:30 PM JST(6:15 AM - 6:30 AM UTC)English Presentation

[19p-C43-6] Electron Dynamics of Ultrafast Vector Vortex Laser Irradiation

〇(M2)JIAMING ZHANG¹, Morita Ken², Verdad C. Agulto¹, Kosaku Kato¹, Makoto Nakajima¹ (1.ILE., Osaka Univ., 2.Chiba Univ.)

Keywords:

vortex beam,electron dynamics,angular momentum

The dynamical effects of lasers have garnered widespread attention, holding significant research value in fields such as optical tweezers (optical trapping), laser processing, and photonic nanojets . Studies related to optical dynamical effects primarily focus on dielectric materials . On the other hand, research on interactions between optical light and single-charged electrons is mainly focused on the conduction electron excitations in the semiconductors involving the quantum transitions, leaving their dynamics insufficiently explored. Recently, we reported an experiment using ultrafast lasers to observe electron relativistic effects, demonstrating the enormous potential of optoelectronic interactions. Studying the dynamic effects of lasers on electrons in free carriers in simple materials rather than in dielectric materials, which are assemblies of dipoles, provides a deeper understanding of the dynamics of lasers and the photo-electron interactions.
In this study, we simulated the motion of nearly free electrons in a GaAs under an external laser field of vector vortex beams. Through this research, we aim to derive the macroscopic light-driven force on electrons and find the trace how the spin angular momentum (SAM) and orbital angular momentum (OAM) of the laser affects the specific motion of electrons in the semiconductors.