The ablation of gold and nickel with a single exposure to 80-fs laser pulses with a moderate intensity (1012–1013 W/cm2) is studied by intereference microscopy. The reflection coefficients...

Interference microscopy was used to study the ablation of a titanium target with a single exposure to laser pulses of 40 fs. The threshold of thermomechanical ablation is measured by the...

We have studied tantalum ablation under a single impact by 80-fs laser pulses using interference microscopy with a temporal resolution and scanning electron microscopy. The ablation plume...

Time and spatial-resolved interferometric technique in a picosecond range was used for continuous registration of motion of iron target surface heated by femtosecond laser pulse. The magnitude of the tensile stress 0.5-1.3 GPa leading to fracture of molten iron at the strain rate of ~ 10⁹ s^-1 was experimentally determined from the measured velocity histories of the spalled layer movement.

THz radiation induces a variety of processes in cells and has attracted the attention of researchers in recent decades. Here, data on the effects of high-intensity terahertz (THz) radiation on human directly reprogrammed neural progenitor cells (drNPCs) and on neuroblastoma cells (SK-N-BE (2)) were obtained for the first time. The results demonstrated that the exposure of non-tumor and tumor cells to broadband (0.1–3 THz) THz pulses with the intensity of 21 GW/cm² and the electric field strength of 2.8 MV/cm for 30 min induced neither a noticeable genotoxic effect nor a statistically significant change in the proliferative activity and cell differentiation. It was also shown that the combined effect of THz radiation and salinomycin, a promising antitumor agent, on neuroblastoma cells did not enhance the genotoxic effect of this antibiotic. However, further studies involving chemotherapy drugs and other exposure parameters are warranted to introduce this new concept into anti-tumor clinical practice and to enhance the efficacy of the existing approaches.

Ablation of refractory metals with ultrashort laser pulses remains little-studied as opposed to other metals with a relatively low melting temperature like aluminum and gold. In this paper ablation of tantalum by femtosecond laser pulses is investigated. The results of hydrodynamic simulation of surface evolution are compared to experimental data obtained by a time-resolved interferomety method. The aspects of ablation dynamics induced by electronic pressure and acoustic tension at one- and two-temperature stages respectively are investigated theoretically and experimentally. The data on strength of tantalum liquid phase at extension rate of about 10⁹ s⁻¹ are presented.