arXiv subjects

Pedro Gonzalez de Alaiza Martinez

Publications and source records attributed to Pedro Gonzalez de Alaiza Martinez.

2 recordsLinked to original sources

arXiv2019

Optical Bloch modeling of few-cycle laser-induced electron dynamics in dielectrics

We develop a new model of laser-matter interaction based on Optical Bloch Equations, which includes photo-ionization, impact ionization, and various relaxation processes typical of dielectric materials. This approach is able to describe the temporal evolution of the electron dynamics in the conduction band driven by few-cycle laser pulses of any wavelength. Moreover, the nonlinear polarization response of both centrosymmetric and non-centrosymmetric materials can be described while ensuring the proper selection rules for the harmonics emission.

physics.optics↗

arXiv2017

Broadband terahertz emission from two-color fs-laser-induced microplasmas

We investigate terahertz emission from two-color fs-laser-induced microplasmas. Under strongest focusing conditions, microplasmas are shown to act as point-sources for broadband terahertz-to-far-infrared radiation, where the emission bandwidth is determined by the plasma density. Semi-analytical modeling allows us to identify scaling laws with respect to important laser parameters. In particular, we find that the optical-to-THz conversion efficiency crucially depends on the focusing conditions. We use this insight to demonstrate by means of Maxwell-consistent 3D simulations, that for only 10-$μ$J laser energy a conversion efficiency well above $10^{-4}$ can be achieved.

physics.optics↗