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 …

In this paper, a spatially selective (SS) structure is investigated through the critical jump
characteristic when the permittivity of the epsilon-negative (ENG) materials approaches …

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 …

We propose and experimentally demonstrate femtosecond direct laser writing with Bessel
beams for the fabrication of photonic crystals with spatial filtering functionality. Such filters …

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

We investigate beam shaping in broad area semiconductor amplifiers induced by a 2-
dimensional (longitudinal and lateral) periodic modulation of the pump on a scale of several …

Spatial filtering is an important mechanism to improve the spatial quality of laser beams.
Typically, a confocal arrangement of lenses with a diaphragm in the focal plane is used for …

In this work, the possibility of using periodic refractive index modulation–photonic crystals–to
counteract the spatial Kerr effect, thus suppressing filamentation, is shown. Numerical …

Broad aperture semiconductor lasers usually suffer from low spatial quality of the emitted
beams. Due to the highly compact character of such lasers, the use of conventional …

We propose and experimentally demonstrate spatial filtering by photonic crystals in a Bragg
configuration. Compared to the Laue configuration, where spatial filtering was already …