Comparison of the spectra of a blackbody and thermally stimulated surface plasmon polaritons in the infrared range

The emission spectra of thermally stimulated surface plasmon polaritons (thermally stimulated surface plasmon polaritons) and a blackbody have been analyzed and compared, and the temperature dependence of these spectra has been studied. It has been found that the total energy of the entire ensemble of surface plasmons is proportional to the cube of temperature and their spectrum is red-shifted from the blackbody spectrum. It has been shown that the spectrum of thermally stimulated surface plasmon polaritons obeys the Wien’s displacement law, yet with another constant. The fraction of the photon energy of the conducting layer transferred to the surface plasmons has been estimated. It has been demonstrated numerically by the example of a gold layer that this fraction can exceed 10% for a layer thickness of less than 1 mm. © 2016, Pleiades Publishing, Ltd

КЛИНИЧЕСКИЙ ОПЫТ ВЕДЕНИЯ РЕБЕНКА С СИНДРОМОМ КОРОТКОЙ КИШКИ

The article presents the 2-year clinical observation experience in a child with the short bowel syndrome. The short bowel syndrome is a complex of pathophysiological disturbances developed following the extensive resection of the small intestine. A number of surgeries failed to give satisfactory results. This prevents from the active usage of physiological enteral nutrition. The patient has been given total parenteral nutrition for 2 years, from the moment of birth till present.В статье представлен клинический опыт двухлетнего наблюдения за ребенком с синдромом короткой кишки. Синдром короткой кишки - это комплекс патофизиологических нарушений, развивающийся после обширной резекции тонкой кишки. Ребенок с рождения перенес ряд оперативных вмешательств, которые оказались безуспешными, что не позволяло активно использовать физиологическое энтеральное питание. В течение 2-х лет, с момента рождения до настоящего момента, пациент находится на полном парентеральном питании

Comparison of the spectra of a blackbody and thermally stimulated surface plasmon polaritons in the infrared range

The emission spectra of thermally stimulated surface plasmon polaritons (thermally stimulated surface plasmon polaritons) and a blackbody have been analyzed and compared, and the temperature dependence of these spectra has been studied. It has been found that the total energy of the entire ensemble of surface plasmons is proportional to the cube of temperature and their spectrum is red-shifted from the blackbody spectrum. It has been shown that the spectrum of thermally stimulated surface plasmon polaritons obeys the Wien’s displacement law, yet with another constant. The fraction of the photon energy of the conducting layer transferred to the surface plasmons has been estimated. It has been demonstrated numerically by the example of a gold layer that this fraction can exceed 10% for a layer thickness of less than 1 mm. © 2016, Pleiades Publishing, Ltd

Static Two-Beam Surface Plasmon Interferometer of the Terahertz Range

A new scheme of static surface plasmon polaritons(SPPs) interferometer of the terahertz (THz) range is described. The interference pattern is formed due to interaction of two converging SPP beams that have run different distances. The original SPP beam is splitted and reflected by a flat beam splitter and a mirror disposed of the waveguiding surface and normally to it. By varying the distance spacing the splitter and the coupling element one can change the pattern period. Execution of the pattern enables one to determine both the real and imaginary part of the SPPs refractive index, which is uniquely related to the dielectric constant of the surface and the optical characteristics of its transition layer. The operating time of the interferometer is determined by the photodetector time constant, which is extremely important for studying fast processes on a conducting surface. The interferometer can work with broadband THz radiation sources (such as synchrotrons or pulsed lasers) as well

In-plane interferometry of terahertz surface plasmon polaritons

The paper is devoted to the development of interferometric schemes for determining the complex refractive index κ = κ′+i•κ″ κ of surface plasmon-polaritons (SPPs) of the terahertz (THz) spectral range. As the value of κ depends on the dielectric constant ϵm of the metal surface guiding the SPPs it can be used for determining m in the far infrared what other optical methods fail to do due to high reflectivity of metals. We discuss two types of THz SPP interferometers in which the interference pattern is formed as a result of the interaction of SPP beams themselves rather than bulk waves produced by these beams. The first type of interferometers are static devices that enable one to investigate fast processes on the metal surface, while the second type are dynamic ones that make it possible to realize Fourier spectroscopy of the metal surface and its transition layer at THz frequencies. Devices of the both types produce interferograms enabling one to determine the real and the imaginary parts of κ. The results of experiments on the interaction of THz SPPs with flat mirrors and beam - splitting plates, the key elements of the THz SPP interferometers, are presented. © Published under licence by IOP Publishing Ltd