Orientation, substructure, and optical properties of rutile films

The orientation, optical properties, and substructure of rutile films prepared by thermal and pulsed photon assisted oxidation of single crystal Ti films were investigated by transmission electron micros copy, optical spectroscopy, and high energy electron diffractionyesBelgorod State Universit

Multidimensional synthetic chiral-tube lattices via nonlinear frequency conversion.

Geometrical dimensionality plays a fundamentally important role in the topological effects arising in discrete lattices. Although direct experiments are limited by three spatial dimensions, the research topic of synthetic dimensions implemented by the frequency degree of freedom in photonics is rapidly advancing. The manipulation of light in these artificial lattices is typically realized through electro-optic modulation; yet, their operating bandwidth imposes practical constraints on the range of interactions between different frequency components. Here we propose and experimentally realize all-optical synthetic dimensions involving specially tailored simultaneous short- and long-range interactions between discrete spectral lines mediated by frequency conversion in a nonlinear waveguide. We realize triangular chiral-tube lattices in three-dimensional space and explore their four-dimensional generalization. We implement a synthetic gauge field with nonzero magnetic flux and observe the associated multidimensional dynamics of frequency combs, all within one physical spatial port. We anticipate that our method will provide a new means for the fundamental study of high-dimensional physics and act as an important step towards using topological effects in optical devices operating in the time and frequency domains

The Significance of the 2005 UN Basic Principles and Guidelines on the Right to a Remedy and Reparation

INTRODUCTION. The research analyzes the UN Basic Principles and Guidelines on the Right to a Remedy and Reparation for Victims of Gross Violations of International Human Rights Law and Serious Violations of International Humanitarian Law (Basic Principles and Guidelines) of December 16, 2005. The Article examines the stages of the adoption of this document, the concept, structure, basic provisions, as well as the importance for the development of modern international law, particularly in the field of human rights protection and international humanitarian law. Consequently, the Article provides a detailed analysis of the approach to the central subject of this document, that is, the right to a remedy and reparation, which is expressed in practical application by universal and regional bodies on human rights and in the field of humanitarian law. In this regard, the position of the right to a remedy and reparation in the complex of human rights is determined, as well as their interconnection and relation to each other.MATERIALS AND METHODS. The theoretical researches of the Russian and foreign experts in the field of international law have been analyzed in this very Article as well as the normative documents, recommendations, and decisions of the treaty bodies on human rights within the UN system, the law enforcement practice of universal and regional judicial and quasi-judicial bodies for the protection of human rights and in the field of international humanitarian law have also been studied. Such methods of scientific cognition as analysis and synthesis, the generalization method, the system-structural method, as well as the historical-legal and legal-technical methods have also been applied in this research.RESEARCH RESULTS. The Article reveals the significance and impact of the mechanism developed in the Basic Principles and Guidelines, in general, on the international human rights system. The Basic Principles and Guidelines are an international document, developed with the best practice of existing legal systems. It was adopted unanimously through the consensus reached by all parties concerned. The Basic Principles and Guidelines are aimed at codifying the provisions on the right to a remedy and reparation enshrined in various international treaties and as well as at developing a unified approach to these rights. Thus, the said international instrument does not create any new rules but classifies and uniforms the set of provisions on the right to a remedy and reparation. This nature of the Basic Principles and Guidelines makes them an attractive tool for international bodies in their law enforcement practice related to ensuring the right to a remedy and reparation. DISCUSSION ANDCONCLUSSIONS. The Basic Principles and Guidelines enshrine the responsibility of States in the field of human rights protection, when the second party to the conflict is individual, or individuals whose rights have been or may be violated. Therefore, the Basic Principles are focused on the interests of the victim of a violation of human rights, that is, they are deliberately humanistic and human rights oriented. The document provides a classification of victims to more adequately cover human rights mechanisms that ensure the protection of persons, individually or collectively. Further, it pays special attention to the protection of victims of gross violations of human rights. In addition, the Basic Principles and Guidelines list and describe forms of reparation for the victims of human rights violations

Orientation, substructure, and optical properties of rutile films

The orientation, optical properties, and substructure of rutile films prepared by thermal and pulsed photon assisted oxidation of single crystal Ti films were investigated by transmission electron micros copy, optical spectroscopy, and high energy electron diffractionyesBelgorod State Universit

Multi-dimensional synthetic space and state measurement with spectral photonic lattices

© OSA 2018. We propose and experimentally realize spectral photonic lattices with pumpinduced frequency couplings, which can emulate multi-dimensional dynamics with synthetic gauge fields and enable single-shot measurement of the signal phase and coherence

Scalable multi-dimensional synthetic space and full state reconstruction in spectral lattices

© 2018 The Author(s). We propose and experimentally realize spectral photonic lattices with pumpinduced frequency couplings, which can emulate multi-dimensional dynamics with synthetic gauge fields and enable single-shot measurement of the signal phase and coherence

Broadband on-chip polarization mode splitters in lithium niobate integrated adiabatic couplers

© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. We report, to the best of our knowledge, the first broadband polarization mode splitter (PMS) based on the adiabatic light passage mechanism in the lithium niobate (LiNbO3) waveguide platform. A broad bandwidth of ~140 nm spanning telecom S, C, and L bands at polarization-extinction ratios (PER) of >20 dB and >18 dB for the TE and TM polarization modes, respectively, is found in a five-waveguide adiabatic coupler scheme whose structure is optimized by an adiabaticity engineering process in titanium-diffused LiNbO3 waveguides. When the five-waveguide PMS is integrated with a three-waveguide “shortcut to adiabaticity” structure, we realize a broadband, high splitting-ratio (ηc) mode splitter for spatial separation of TE- (H-) polarized pump (700-850 nm for ηc>99%), TM- (V-) polarized signal (1510-1630 nm for ηc>97%), and TE- (H-) polarized idler (1480-1650 nm for ηc>97%) modes. Such a unique integrated-optical device is of potential for facilitating the on-chip implementation of a pump-filtered, broadband tunable entangled quantum-state generator

Broadband On-Chip Adiabatic-Coupling Polarization Mode Splitters in Lithium Niobate Waveguides

© 2019 The Author(s) 2019 OSA. We report the first broadband (>120 nm at >97% splitting efficiency for both polarization modes) polarization mode-splitter in LiNbO3 adiabatic light-passage configuration. This device can facilitate the on-chip implementation of pump-filtered, broadband tunable Bell-state generators

Asymmetric adiabatic couplers for fully-integrated broadband quantum-polarization state preparation

© 2017 The Author(s). Spontaneous parametric down-conversion (SPDC) is a widely used method to generate entangled photons, enabling a range of applications from secure communication to tests of quantum physics. Integrating SPDC on a chip provides interferometric stability, allows to reduce a physical footprint, and opens a pathway to true scalability. However, dealing with different photon polarizations and wavelengths on a chip presents a number of challenging problems. In this work, we demonstrate an on-chip polarization beam-splitter based on z-cut titanium-diffused lithium niobate asymmetric adiabatic couplers (AAC) designed for integration with a type-II SPDC source. Our experimental measurements reveal unique polarization beam-splitting regime with the ability to tune the splitting ratios based on wavelength. In particular, we measured a splitting ratio of 17 dB over broadband regions (>60 nm) for both H-and V-polarized lights and a specific 50%/50% splitting ratio for a cross-polarized photon pair from the AAC. The results show that such a system can be used for preparing different quantum polarization-path states that are controllable by changing the phase-matching conditions in the SPDC over a broad band. Furthermore, we propose a fully integrated electro-optically tunable type-II SPDC polarization-path-entangled state preparation circuit on a single lithium niobate photonic chip