CeF_3 and PrF_3 as UV-Visible Faraday rotators

Quantum key distribution using quantum Faraday rotators.

We propose a new quantum key distribution (QKD) protocol based on the fully quantum mechanical states of Faraday rotators. The protocol is unconditionally secure against collective attacks for a multi-photon source of up to two photons on a noisy environment. It is also robust against impersonation attacks. The protocol may be implemented experimentally with the current spintronics technology o...

UV-Visible spectrophotometry of Repaglinide in bulk and in formulation by using methyl orange as reagents

Two sensitive spectrophotometric methods are presented for the assay of Repaglinide in bulkdrug and in formulations using methyl orange, as reagents. Oxidant by reacting with a fixedamount of either methyl orange and measuring the absorbance at 485.2 nm (method-I) andmeasuring the absorbance at 618.9 nm (method-II). Developed method is based on the formationof extractable colored complex of dru...

Basic UV/Visible Spectrophotometry

Variable geometric-phase polarization rotators for the visible

We present the principles of variable pure polarization rotators based on the accumulation of a geometric phase that is obtained by coiling a beam of light via discrete reflections. They consist of two pseudo rotators in series. By changing the angle between the pseudo rotators the geometric phase acquired by the light is varied. We describe in detail two important examples: the variable-angle ...

Enhancement of the Uniformity and Rotation of Large Aperture, Permanent Magnet, Tunable Faraday Rotators

We present new methods for increasing the magnitude and uniformity of rotation of a Faraday rotator with a large clear aperture . We show theoretically and experimentally that the amount of rotation and the uniformity of rotation across the aperture can be simultaneously increased by introducing a small separation between adjacent, oppositely oriented magnets . Furthermore we show that the unif...