Work

Femtosecond laser-induced breakdown in water-like tissues: Influence of wavelength and pulse duration on electron dynamics

Year: 2025

Type: article

Abstract: This study explores the initiation mechanisms of laser-induced breakdown in water-like tissues by examining the impact of ultra-short laser pulses at varying wavelengths. Using numerical simulations, we analyse the electron dynamics triggered by pulse durations from 1 fs to 150 fs at two specific wavelengths, 400 nm and 800 nm. The results highlight how shorter pulses predominantly drive photoionization due to their intense peak powers, while longer pulses facilitate cascade ionization, enhancing electron densities through prolonged interactions with the tissue. Our analysis reveals that the deeper penetration of 800 nm pulses allows for more significant cascade ionization effects, particularly at extended pulse durations, leading to a substantial increase in electron density. This study underscores the role of pulse duration and wavelength in influencing the primary ionization processes essential for laser induced breakdown, providing a foundation for optimizing laser applications in medical and material sciences.

Source: Kragujevac Journal of Science

DOI: 10.5937/kgjsci2501029p

Authors: Violeta Petrović, Marković Delibašić, Ivan Petrović

Institution: University of Kragujevac

Language: English

Topic: Laser Material Processing Techniques

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

Funders: Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja, Science Fund of the Republic of Serbia

Awards: G1027579543, G2466948275