My research activities can be divided into three topics:
1. Nonlinear optics in fibers and waveguides.
area of research includes ultrafast nonlinear processes such as
supercontinuum generation, pulse guiding, generation of new
frequencies, strong-field fiber optics including plasma generation,
pulse compression etc. I develop and implement numerical methods and
implement them for studies of various physical processes, ranging from
discrete spatial diffraction through Kerr and Raman effects to
of line narrowing in continuous-wave-pumped fiber filled with
Raman-active gas. Forward- and backward- propagating Stokes waves
create a standing wave and a periodic lattice of population difference,
which results in an array of deep subwavelength potential traps.2. Linear and nonlinear nanooptics.
nanometer-scaled systems are studied numerically, including
metal-nanoparticle composites, photonic crystals, nanostructures, and
rough surfaces. The considered optical processes include high harmonic
generation, enhancement of nonlinearity, bistable optical behaviour,
and focusing below the diffraction limit.
optical transmission in a planar nonlinear metal-dielectric array. A
metal-like state B reflects incoming light; a dielectric-like state
transmits light and has positive dielectric function due to
3. Strong-field optics, high harmonic generation and material modification.
phenomena occuring under the influence of photoionization are
considered by the numerical methods are treated by home-made numerical
algorithms developed to adress the corresponding problem. The
investigated systems include high harmonic generation in gases,
formation of overcritical plasma caused by light, nanoparticle-enhanced
HHG and so on.
of high-intensity, tightly focused light propagating through fused
silica. The formation of overctirital plasma in the focal region
introduces backreflection and strong perturbation to the field.