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Quantum erasing of laser emission in N
Rostyslav Danylo, Guillaume Lambert, Yi Liu +3
Cavity-free lasing of N induced by a femtosecond laser pulse at 800~nm is nearly totally suppressed by a delayed twin pump pulse. We explain this surprising effect within the…
Backward lasing of singly ionized nitrogen ions pumped by femtosecond laser pulses
Xiang Zhang, Rostyslav Danylo, Zhengquan Fan +6
We report on the observation of backward lasing at 391.4 nm of nitrogen ions pumped by linearly polarized intense femtosecond pulses at 800 nm. The strongly enhanced spectral inten…
Recollision induced superradiance of ionized nitrogen molecules
Yi Liu, Pengji Ding, Guillaume Lambert +3
We propose a new mechanism to explain the origin of optical gain in the transitions between excited and ground state of the ionized nitrogen molecule following irradiation of neutr…
Amplified short-wavelength light scattered by relativistic electrons in the laser-induced optical lattice
I. A. Andriyash, V. T. Tikhonchuk, V. Malka +2
The scheme of the XUV/X-ray free electron laser based on the optical undulator created by two overlapped transverse laser beams is analyzed. A kinetic theoretical description and a…
Ablation of solids by femtosecond lasers: ablation mechanism and ablation thresholds for metals and dielectrics
E. G. Gamaly, A. V. Rode, V. T. Tikhonchuk +1
The mechanism of ablation of solids by intense femtosecond laser pulses is described in an explicit analytical form. It is shown that at high intensities when the ionization of the…