Subwavelength Raman Laser Driven by Quasi Bound State in the Continuum

Raman lasers is an actively developing field of nonlinear optics aiming to create efficient frequency converters and various optical sensors. Due to the growing importance of ultracompact chip-scale technologies, there is a constant demand for optical devices miniaturization, however, the development of a nanoscale Raman laser remains a challenging endeavor. In this work, we propose a fully subwavelength Raman laser operating in visible range based on a gallium phosphide nanocylinder resonator supporting a quasi bound state in the continuum (quasi-BIC). We perform precise spectral matching of nanoparticle's high-$Q$ modes with the pump and detuned Raman emission wavelengths. As a result of our simulations, we demonstrate a design of Raman nanolaser, ready for experimental realization, with the lasing threshold expected to be as low as $P_{\mathrm{th}} \approx 21~\mathrm{mW}$. The suggested configuration, to the best of our knowledge, represents the very first prototype of a low-threshold Raman nanolaser with all the dimensions smaller than the operational wavelength.Comment: 7 pages for main document including 4 figures, 2 pages for supplementary document including 1 figur

Folk Terminology Associated with Multipart Singing among Russians

The article is devoted to folk singing terminology associated with multipart singing in Russian regional musical and folklore traditions. This terminology reveals a systemic character, since it directly correlates with the terms denoting the intonation types characteristic, on the one hand, of a broad (protyazhnïy) style of singing, a clear representative of which is the genre of lyrical songs, and on the other hand, of lamentable intonation, which is due to the desire to emphasize the personal nature of the expressed feelings. The article discusses the types of multipart texture and functions of singers in an ensemble which have received terminological designations

Age-sex marriage and the family structure of the guild merchants Yenisei province 60s. XIX - early XX centuries.

The article in the light of the modernization theory explains how to change the age and gender of marital and family structures guild merchants Yenisei province in the 60-ies. XIX - early XX centuries. Particular attention is paid to the processes of transformation of traditional society into an industrial-based analysis of demographic indicators of the merchant class. In archival materials, many of which are first introduced into scientific circulation shows age and sex and family and marriage patterns of guild merchants. A comparison study with other indicators of Siberian regions and national trends. It was revealed that the family and marriage structure of the merchants of the Yenisei province in the study period was influenced by traditional norms, although the trend towards degradation of family forms, first of all, the patriarchal type, characteristic of the rise of modernization processes, traced, especially in urban areas. The dynamics of the age and sex structure, indicative of the stabilization of migration flows in the region, indicating that the «smoothing» of the colonial specifics of the region

Individual Model of Psychological Health in Educational Process Subjects in Distance Learning Conditions

The article examines the problem of studying the individual model of psychological health of the students and employees of the Moscow International Academy (MIA). The goal is to explore the specific characteristics of personal psychological health in MIA students and employees. The implementation of the research program required the researcher to be ready and able to interact in the field of mental and psychological health of the individual, knowledge of age, individual psychological characteristics of the respondents to develop a research program, the ability to conduct psychodiagnostic work, the ability to analyze their own activities in order to optimize it, as well as to be creative. solving the assinged tasks. Authors used the methodology “Individual model of psychological health” by A.V. Kozlov. The method “Individual model of psychological health” was developed in 2014 in the course of psychosemantic analysis of the concept by students of the phenomenon of psychological health. Based on the data acquired, it can be concluded that the hypothesis on the influence of self-isolation on the model of psychological health in various age groups is partially confirmed as older study participants face difficulties with life prospects and experience stress when planning their future. Students also demonstrate low development levels in some components of the model explained by the general level of personality development in the intellectual and spiritual aspects

Опыт лингвистического анализа по делам о преступлениях против половой неприкосновенности и половой свободы личности

The paper is devoted to understanding the provisions of the Penal Code of the Russian Federation concerning crimes against sexual inviolability and sexual freedom of the individual. The potential for using special knowledge of linguistics in the criminal investigation of such offenses is explored based on the analysis of the wording of relevant articles in the Code, determining the purpose of communication, characterizing interaction between communicating parties, and establishing the scope of linguistic expert competence.Статья посвящена осмыслению положений Уголовного кодекса РФ, касающихся преступлений против половой неприкосновенности и половой свободы личности. На основе анализа диспозиций соответствующих статей Кодекса, определения цели коммуникации, особенностей взаимодействия участников коммуникации, установления компетенции эксперта-лингвиста рассматриваются возможности применения специальных лингвистических знаний по делам данной категории

The determination of the thermal properties of unconsolidated materials

Heat transfer in a composite cylindrical region is considered. An approximate analytical solution of the direct problem is obtained. It is shown that, beginning at the instant t > t , the relative error of the solution obtained does not exceed 1%. On the basis of this, algorithms are constructed which enable inverse problems to be solved effectively. Examples of the use of the algorithms to determine the thermal properties of unconsolidated materials are presented. © 2012 Springer Science+Business Media, Inc

Opto-thermally controlled beam steering in nonlinear all-dielectric metastructures

Reconfigurable metasurfaces have recently gained a lot of attention in applications such as adaptive meta-lenses, hyperspectral imaging and optical modulation. This kind of metastructure can be obtained by an external control signal, enabling us to dynamically manipulate the electromagnetic radiation. Here, we theoretically propose an AlGaAs device to control the second harmonic generation (SHG) emission at nanoscale upon optimized optical heating. The asymmetric shape of the used meta-atom is selected to guarantee a predominant second harmonic (SH) emission towards the normal direction. The proposed structure is concurrently excited by a pump beam at a fundamental wavelength of 1540 nm and by a continuous wave (CW) control signal above the semiconductor band gap. The optical tuning is achieved by a selective optimization of meta-atoms SH phase, which is modulated by the control signal intensity. We numerically demonstrate that the heating induced in the meta-atoms by the CW pump can be used to dynamically tune the device properties. In particular, we theoretically demonstrate a SH beam steering of 8° with respect to the vertical axis for an optimized device with average temperature increase even below 90° C