The rapid expansion of femtosecond (fs) laser technology brought previously unavailable
capabilities to laser material processing. One of the areas which benefited the most due to …

Photonic crystals are well known for their celebrated photonic band-gaps—the forbidden
frequency ranges, for which the light waves cannot propagate through the structure. The …

The microchip lasers, being very compact and efficient sources of coherent light, suffer from
one serious drawback: low spatial quality of the beam strongly reducing the brightness of …

Using the transfer matrix method approach (TMM), the microwave transmission spectra in
hybrid quasi-periodic multilayer photonic structures are studied. These structures are formed …

Microscale 3D-printing has revolutionized micro-optical applications ranging from
endoscopy, imaging, to quantum technologies. In all these applications, miniaturization is …

An approach to switching between different patterns of light beams transmitted through the
woodpile photonic crystals filled with liquid crystals is proposed. The phase transition …

New diffractive optical elements offering a frequency tolerant, very efficient, high-pass and
bandpass spatial filtering over a broad range of incidence angles are demonstrated by …

We propose and experimentally show the mechanism of beam super-collimation by
axisymmetric photonic crystals, specifically by periodic (in propagation direction) structure of …

The potential for use of staggered structures to provide optical broadband angular selectivity
is proposed and verified. The numerical results show that the angular selectivity …

Flat nanophotonic devices hold a great potential to process diffractive optical information
within ultra-thin submicron thickness. In particular, optical filtering of transmissive angular …