Generalized vector diffraction model for tight focusing of light with arbitrary polarization state

With modern undulators generating light of an arbitrary polarization state, experiments exploiting this feature in the soft X-ray region are becoming increasingly widespread. Circularly polarized light in the soft X-ray region is of particular interest to investigate of magnetic metals such as Fe, Co and Ni, and the rare earths. A versatile multilayer polarimeter has been designed and developed to characterize the polarization state of the soft X-ray beam. A W/B4C multilayer transmission phase retarder and reflection analyser has been used for polarimetry measurements on the beamline (I06) at Diamond Light Source. The design details of the polarimeter and preliminary polarimetry results are presented.

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Passively self-error-rejecting qubit transmission over a collective-noise channel

Quantum Information and Computation ◽

10.26421/qic11.11-12-2 ◽

2011 ◽

Vol 11 (11&12) ◽

pp. 913-924

Author(s):

Fu-Guo Deng ◽

Xi-Han Li ◽

Hong-Yu Zhou

Keyword(s):

Quantum Communication ◽

Polarization State ◽

Success Probability ◽

Single Photons ◽

Collective Noise ◽

Transmission Scheme ◽

Arbitrary Polarization ◽

Single Qubit ◽

Almost All ◽

Decoherence Free Subspace

We propose a passively self-error-rejecting single-qubit transmission scheme for an arbitrary polarization state of a single qubit over a collective-noise channel, without resorting to additional qubits and entanglement. By splitting a single qubit into some wavepackets with some Mach-Zehnder interferometers, we can obtain an uncorrupted state with a success probability approaching 100% via postselection in different time bins, independent of the parameters of collective noise. It is simpler and more flexible than the schemes utilizing decoherence-free subspace and those with additional qubits. One can directly apply this scheme to almost all quantum communication protocols based on single photons or entangled photon systems against a collective noise.

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Diffraction Properties of Ultrashort Pulsed Beam with Arbitrary Polarization State by a Reflection Volume Holographic Grating in LiNbO3 Crystal

2011 Symposium on Photonics and Optoelectronics (SOPO) ◽

10.1109/sopo.2011.5780572 ◽

2011 ◽

Author(s):

Yingyan Yi ◽

Deming Liu

Keyword(s):

Polarization State ◽

Holographic Grating ◽

Linbo3 Crystal ◽

Arbitrary Polarization

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Holographic Formation of Non-uniform Diffraction Structures by Arbitrary Polarized Recording Beams in Liquid Crystal-photopolymer Compositions

Polymers ◽

10.3390/polym11050861 ◽

2019 ◽

Vol 11 (5) ◽

pp. 861 ◽

Cited By ~ 2

Author(s):

Artem Semkin ◽

Sergey Sharangovich

Keyword(s):

Liquid Crystal ◽

Liquid Crystals ◽

Numerical Simulations ◽

Polarization State ◽

Dielectric Tensor ◽

Arbitrary Polarization ◽

Recording Process ◽

Polymer Dispersed ◽

The Media ◽

Light Beams

In this work, the theoretical model of non-uniform diffraction structures’ holographic formation in liquid crystal-photopolymer (LC-PPM) composite materials with a dye-sensitizer is developed. The model takes into account the arbitrary character of amplitude and phase spatial distributions of recording light field, its arbitrary polarization state and also a non-linearity of the recording process. Two the most common types of liquid crystal-photopolymer composite are investigated: Holographic polymer-dispersed liquid crystals (H-PDLC) and polymer-stabilized liquid crystals (PSLC). Numerical simulations for the most common cases of holographic formation schemes are made. It is shown that due to the photo-induced Freedericksz transition, in the case of arbitrary polarization states of recording light beams, the non-uniform polarization diffraction grating (PDG) is formed in LC-PPM. Numerical simulations’ results show that PDG’s contribution to the change of the dielectric tensor of the media is comparable with the contribution of the photopolymerization-diffusion process.

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