Nikolay Dimitrov

TL;DR: In this paper, a nonlinear wave-mixing process was used to perform infrared imaging in a metasurface composed of GaAs semiconductor nanoantennas, and the upconversion of short-wave infrared wavelengths via the coherent parametric process of sum-frequency generation was shown.

TL;DR: In this article, a nonlinear wave-mixing process was used to perform infrared imaging in a metasurface composed of GaAs semiconductor nanoantennas, and the up-conversion of short-wave infrared wavelengths via the coherent parametric process of sum-frequency generation was shown.

TL;DR: In this paper, a self-focusing bulk photorefractive nonlinear medium (crystal SBN:60) using a frequency-doubled Nd:YVO4 laser at 532 nm was used for parallel all-optical guiding of optical signals at wavelengths.

TL;DR: In this paper, a reliable criterion for the precision in aligning dispersionless systems for manipulating ultrashort pulses is developed, specifically including cases when the pulse front tilt is a result of a desired spatio-temporal coupling, and the results obtained using two low-dispersion diffraction gratings are in good qualitative agreement with the data from a previously developed analytical model and from an independent interferometric measurement.

TL;DR: In this paper, an improved technique for measuring both the magnitude and sign of the topological charge of input optical vortex beams carried by short laser pulses is presented. But this technique is not suitable for the case of continuous wave and femtosecond laser pulses with an eventual pulse front tilt.