Representação do lenguaje del concepto "britishess" en el discurso de medios británicos post-brexit

The aim of the article is to analyze the concept “Britishness”, peculiarities of its language representation in the situation of the post Brexit policy in the modern British media discourse. It can be presented by a number of semantic meanings which find their expression in specific contexts determined by the basic task of Media language, i.e. to transfer information not only objectively but in accordance with particular attitudes and beliefs. In today’s British society the concept “Britishness” is a key element in the system of British cultural values.El objetivo del artículo es analizar el concepto "británico", peculiaridades de su representación del lenguaje en la situación de la política post-Brexit en el discurso mediático británico moderno. Puede presentarse mediante varios significados semánticos que encuentran su expresión en contextos específicos determinados por la tarea básica del lenguaje de los medios, es decir, transferir información no solo objetivamente sino de acuerdo con actitudes y creencias particulares. En la sociedad británica actual, el concepto "británico" es un elemento clave en el sistema de valores culturales británicos.O objetivo do artigo é analisar o conceito "britânico", peculiaridades de sua representação da linguagem na situação da política pós-Brexit no discurso moderno da mídia britânica. Pode ser apresentado através de vários significados semânticos que encontram expressão em contextos específicos determinados pela tarefa básica da linguagem da mídia, isto é, a transferência de informações não apenas objetivamente, mas de acordo com atitudes e crenças particulares. Na sociedade britânica de hoje, o conceito "britânico" é umelemento-chave no sistema britânico de valores culturais

Optomechanical manipulation with hyperbolic metasurfaces

Auxiliary nanostructures introduce additional flexibility into optomechanical manipulation schemes. Metamaterials and metasurfaces capable to control electromagnetic interactions at the near-field regions are especially beneficial for achieving improved spatial localization of particles, reducing laser powers required for trapping, and for tailoring directivity of optical forces. Here, optical forces acting on small particles situated next to anisotropic substrates, are investigated. A special class of hyperbolic metasurfaces is considered in details and is shown to be beneficial for achieving strong optical pulling forces in a broad spectral range. Spectral decomposition of the Green functions enables identifying contributions of different interaction channels and underlines the importance of the hyperbolic dispersion regime, which plays the key role in optomechanical interactions. Homogenised model of the hyperbolic metasurface is compared to its metal-dielectric multilayer realizations and is shown to predict the optomechanical behaviour under certain conditions related to composition of the top layer of the structure and its periodicity. Optomechanical metasurfaces open a venue for future fundamental investigations and a range of practical applications, where accurate control over mechanical motion of small objects is required

Optomechanical Manipulation With Hyperbolic Metasurfaces

Auxiliary nanostructures introduce additional flexibility into optomechanical manipulation schemes. Metamaterials and metasurfaces capable to control electromagnetic interactions at the near-field regions are especially beneficial for achieving improved spatial localization of particles, reducing laser powers required for trapping, and for tailoring directivity of optical forces. Here, optical forces acting on small particles situated next to anisotropic substrates, are investigated. A special class of hyperbolic metasurfaces is considered in details and is shown to be beneficial for achieving strong optical pulling forces in a broad spectral range. Spectral decomposition of Green\u27s functions enables identifying contributions of different interaction channels and underlines the importance of the hyperbolic dispersion regime, which plays the key role in optomechanical interactions. Homogenized model of the hyperbolic metasurface is compared to its metal-dielectric multilayer realizations and is shown to predict the optomechanical behavior under certain conditions related to composition of the top layer of the structure and its periodicity. Optomechanical metasurfaces open a venue for future fundamental investigations and a range of practical applications, where accurate control over mechanical motion of small objects is required

Оптические силы, действующие на частицы вблизи фотонного кристалла

We consider optical forces acting on resonant particles located near the surface of a photonic crystal (PC). The band structure of the PC makes it possible to change the direction of propagation of the BSW (Bloch surface wave) to the opposite when varying the wavelength of the incident radiation, which leads to a change in the direction of the reactive optical force component. Therefore, there is an effect of switching between the modes of optical attraction and repulsion of particles in narrow spectral ranges, which is prospective for precise sorting of resonant particles. Here we consider sorting of core-shell dielectric-gold nanoparticles with varying shell thicknessМы рассматриваем оптические силы, действующие на резонансные частицы, расположенные вблизи поверхности фотонного кристалла. Зонная структура ФК позволяет изменять направления распространения ПВБ на противоположное при варьировании длины волны падающего излучения, что приводит к изменению направления реактивной оптической силы. Таким образом, имеет место эффект переключения между режимами оптического притяжения и отталкивания частиц в узких спектральных диапазонах, что может быть использовано для прецизионной сортировки резонансных части