An ultra-broadband polarization beam splitter (PBS) consisting of cascaded Mach-Zehnder interferometers (MZIs) is proposed on 220 nm-thick silicon-on-insulator (SOI) platform. The configuration the MZIs has a point symmetry in order to broaden bandwidth cross-coupling for TM polarization. sub-wavelength grating (SWG) structures act as effectively anisotropic cladding enhance separation two fund...

We present a bi-directionally 793-nm diode-pumped Tm 3+ , Ho -codoped silica polarization maintaining double-clad all-fiber laser based on single-oscillator architecture emitting 195 W at 2.09 µm in continuous wave mode of operation, with beam quality near the diffraction limit (M 2 = 1.08). The power scaling is only pump-power-limited range total available pump (540 W).

Decorating of Transition metals (TMs) on the "AlMg" nanoalloy has been studied basis Langmuir adsorption applying "ONIOM" model with three levels «high, medium and low» by using "LANL2DZ /6-31+G(d,p)/EPR-III", "semi-empirical" "MM2" functions. The fluctuation "NQR" estimated inhibiting role pyridine alkylpyridines containing 2-picoline (2Pic), 3-picoline (3Pic) ,4-picoline (4Pic), 2,4-lutidine ...

The spectrum of the electron spin–spin interactions largely determines mechanism that governs dynamic nuclear polarization (DNP). A narrow favors solid effect (SE). broader brings cross (CE) into play—that is an exchange Zeeman energy with spins—and a very broad also thermal mixing (TM)—that interaction spins. previous article described Monte Carlo simulations these for approximately spherical ...

Understanding the interplay between electron charge and spin degrees of freedom is crucial in materials of possible technological interest. This requires a full quantum description of the electron spin. For low temperatures, a magnetic material has an electronic structure which has a fixed spin polarization, e.g. a uniform spin polarization for a ferromagnet or fixed sublattice spin polarizatio...

Broadband absorber at high terahertz frequency is highly required for applications in imaging, detecting, electromagnetic stealth. Although intensive investigations of the broadband have been taken, challenges still exist both design and fabrication an ultra-broadband frequency. Herein, a three-layered structure metamaterial has designed to realize covering 3.94–9.98 THz (6.04 THZ) absorption a...

We demonstrate all-optical linear polarization control of exciton-polariton condensates in anisotropic elliptical optical traps. The cavity inherent TE-TM splitting lifts the ground state spin degeneracy with emerging fine structure modes polarized parallel and perpendicular to trap major axis condensate populating latter. Our findings show a new type exciting perspectives both spinoptronics st...

We extend to more than one spatial dimension the semiclassical full-wave vector Maxwell-Bloch equations for the purpose of achieving an adequate and rigorous description of ultrashort pulse propagation in optical waveguides containing resonant nonlinearities. Our considerations are based on the generalized pseudospin formalism introduced by Hioe and Eberly @Phys. Rev. Lett. 47, 838 ~1981!# for ...