Microoptics and photonics group

Microoptics and Photonics Group

The research interests of MPG group over a broad spectrum ranging from microoptics domain as nanostructured gradient index components based on effective medium theory, optofluidic devices, mid infrared fibers and optical components till nonlinear fiber optics

The main focus of current research in nonlinear fiber optics is supercontinuum generation. The aim of the research is developing of new class of supercontinuum sources – broadband sources of coherent radiation – operating in spectral range covering wavelengths from the visible around 500 nm, up to mid-infrared around 5000 nm. Use of photonic crystal fibers made from multicomponent glasses, enables significantly larger degree of freedom in designing of dispersion properties. Innovation of this research is within the use of nanostructure in the core area of photonic crystal fiber, which enables additional degree of freedom in designing a dispersion profile for given pump laser wavelength, which is unavailable for classic photonic crystal fibers. Use of new compositions of multicomponent glasses for photonic crystal fiber drawing is also innovative, since it opens up spectral range up to around 5000-6000 nm, while transmission of classic silica fibers is limited up to around 2400 nm. Glasses developed and synthesized in in-house at Dep. of Grass ITME feature also nonlinearities, which are an order of magnitude, up to two orders of magnitude higher, compared to silica glass. At the same time, material properties of our glasses allow for multiple thermal processing without recrystallization, which enables drawing of air-solid or all-solid (twin glass type) photonic crystal fibers.

The group also study optical properties of a nanostructured microoptical component with various optical functionalities as axicons, multiple focus lenses, birefringent materials. Axicon structures are devoted to generation of focus line along optical, axis as well as multiple focuses, due to combination of axicon and diffractive optical element within a single nanostructured element. This approach is based on Maxwell-Garnett effective medium theory, that allows designing all-dielectric structures with arbitrary topological distribution in 2D and multiplied along 3rd dimension. developed multifocus components will be used for construction of an 3D array of optical traps for small particles in solvent. The scope of the research covers both experimental and theoretical study of nanostructured multifocus axicon components.

Current research projects:

  • 07/2012-06/2015 FNP TEAM/2012-9/1 Novel light sources based on photonic crystal fibers with nanostructured cores, project leader: R. Buczynski, collaborative project with ITME

  • 05/2013-05/2016 nr 193424 Grant NCN HARMONIA Light propagation and localization in media with the competing nonlinearities, project leader: M. Trippenbach, collaborative project with ITME and PW.

  • 05/2014-05/2017 Grant NCN HARMONIA, 2013/10/M/ST3/00708, Study of optical properties of all-dielectric nanostructured axicons and integrated multifocus microstructures, project leader: R. Buczynski, collaborative project with ITME

Ryszard Buczyński, PhD, DSc

Assistant professor at Faculty of Physics UW, leader of Microoptics and Photonics Group

Contact: rbuczyns@igf.fuw.edu.pl

Bartłomiej Siwicki

PhD student at the Faculty of Physics UW

contact: bsiwicki@igf.fuw.edu.pl

Grzegorz Stępniewski

PhD student at the Faculty of Physics UW

contact: gstepniewski@igf.fuw.edu.pl