Circularly polarized laser sources with small footprints and high efficiencies can possess advanced functionalities in optical communication and biophotonic integrated systems. However, the conventional lasers with additional circular-polarization converters are bulky and hardly compatible with nanophotonic circuits, and most active chiral plasmonic nanostructures nowadays exhibit broadband emi...

A_ de~ail~d ex~erimental and theoretical study of dichroic effects in photoelectron angular d1stnbut10ns IS reported for ( 1 + 1), two-color REMPI of NO via the A 2L +, v = 0 state. ?ptically aligned A state rotational levels are probed through ionization by circularly polarized hght. Resultant photoelectron angular distributions exhibit significant left-right asymmetry, the phase and magnitude...

This paper proposes a metamaterial reflective surface (MRS) as a superstrate for a single-feed circularly polarized microstrip patch antenna (SFCP-MPA). It illustrates a simultaneous enhancement on antenna gain, impedance bandwidth (ZBW) and axial-ratio bandwidth (ARBW) by adding the MRS atop the SFCPMPA. The MRS can enhance the ZBW and ARBW by 3.5 and 9.9 times, respectively, compared to the c...

In many single and multi-user MIMO systems, different sorts of symbol mapping are employed. This is of course based on the modulation schemes and/or the pseudo-correlation of the signals. These can be for instance circularly symmetric or non-circular signals which are transmitted. Conventional linear transceiver processing is optimal for circularly symmetric signals but sub-optimal for non-circ...

The behaviour of materials under spatial confinement is sensitively dependent on the nature of the confining boundaries. In two dimensions, confinement within a hard circular boundary inhibits the hexagonal ordering observed in bulk systems at high density. Using colloidal experiments and Monte Carlo simulations, we investigate two model systems of quasi hard discs under circularly symmetric co...

Enhanced mode selective fragmentation of oriented ClCHO(+) → Cl + HCO(+), H + ClCO(+), HCl(+) + CO with linear polarized intense mid-IR pulses was demonstrated in our previous computational study ( J. Phys. Chem. Lett. 2012 , 3 , 2541 ). Simulations of angle-dependent strong field ionization of ClCHO indicate the ionization rate in the molecular plane is nearly twice as large as perpendicular t...

We describe an optical fiber based setup for performing polarization resolved magneto-optical spectroscopy measurements under low temperatures ( approximately 4 K) and high magnetic fields ( approximately 8 T). The measurements are performed in a windowless helium Dewar. Circularly polarized light is produced inside the Dewar by inserting the polarizing elements between the fiber end and the sa...

Analysis of a single-feed arrangement of hexagonal patch is proposed, which is capable of pro viding circular polarization along low return loss. An antenna is designed on a glass epoxy FR-4 substrate with overall thickness of the structure less than 1.6 mm or 0.11A0. Reflection coefficient is better than -22 dB at 5.7 GHz; -32dB at 8.2GHz and impedance better than 50Ω may be achieved with the ...

A microscopic study was carried out on 10 specimens of visceral and superior mesenteric arteries and their branches, taken from domestic pigs. Some thickenings in the middle tunic of the visceral artery and its main branches were observed. The thickenings appeared at intervals of about 2 cm and were even several centimetres long. The structure of the thickenings was similar. Besides numerous ci...

This paper describes the development of notch filters and dichroic beam-splitters, the latter to be a visible 2-channel WDM Multiplexer/Demultiplexer (MUX/DEMUX). Both discrete devices are intended to be used on very short-haul links based on Poly-Methyl-Methacrylate (PMMA) Polymer Optical Fibres (POFs). The filters were built from commercially available multilayer dielectric stack and also fro...