GTIIT-STU optics seminar
Title: Perturbative and non-perturbative light-matter interaction involving spatially structured light beams
Speaker: Bikash Kumar Das (GTIIT)
Abstract
In this talk, I will present our recent works on both nonlinear perturbative [1] (specifically on second harmonic generation) and non-perturbative processes driven by spatially structured light beams. In particular, I will discuss how the utilization of the perfect optical vortex (POV) beams as a pump can remove some of the constraints imposed on the gas-phase high harmonic generation (HHG) driven by Laguerre-Gaussian (LG) vortex beams [2]. Later, I will discuss how we extended our theoretical model from the gas-phase HHG to the solid-state HHG realm to describe the formation of high harmonic vortices from ZnO [3], and the possibility of generating a twisted attosecond pulse train [4].
- Kumar Das, M. Krüger, and M. F. Ciappina, “Second Harmonic Generation in KTP Crystal Driven by Vortex Beams with Integer Topological Charges,” SPIE Proceedings (2024) (in press).
- Das, B. K., Granados, M. Krüger and M. F. Ciappina, “High-Order Harmonic Generation Driven by Perfect Optical Vortex Beams: Exploring the Orbital Angular Momentum Upscaling Law,” Phys. Rev. Res. (2024) (in press), arXiv preprint arXiv:2409.19591, 2024
- Granados, B. Kumar Das and M.F. Ciappina. “Orbital Angular Momentum Beam assisted High-Order Harmonic Generation in Semiconductor Materials,” Submitted to Optics Express (under review) arXiv preprint arXiv:2404.10293, 2024
- Granados, B. Kumar Das, C. Heide, S.Ghimire and M. F. Ciappina, “Attosecond vortices in semiconductor materials,” Communications Physics (under review) arXiv preprint arXiv:2410.14385, 2024