4 papers
Controlling ultrafast laser writing in silica glass by pulse temporal contrast
Yuhao Lei, Huijun Wang, Gholamreza Shayeganrad +2
Control of laser writing in transparent dielectrics using temporal contrast of light pulses is demonstrated. Anisotropic nanopores in silica glass are produced by high-contrast of…
High resolution nanofocus X-ray source based on ultracold electrons from laser cooled-atoms
Gholamreza Shayeganrad
X-ray 3D tomography is So far limited to micron resolution because of the large focusing spot of the focused electron beam on the metal target. Here, we proposed a nanofocous X-ray…
Efficient, self-phase matched, narrow-band, engineered shape, tunable high-order harmonic generation based on femtosecond dynamic grating
L. Mashhadi, G. Shayeganrad
The high-order harmonic generation (HHG), if phase matched, opens a unique way to produce coherent ultrafast extreme-UV (XUV) or soft x-ray light sources. Here we describe a robust…
Investigation of particle and molecular extinction effects in remote sensing by ultraviolet DIAL in the lower atmosphere
Gholamreza Shayeganrad, Leila Mashhadi, Davood Momeni
This study presents theoretical investigation of the effects of particle and molecular extinction in horizontal remote sensing near the ground for several visibilities at UV wavele…