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Physics: Recent submissions

  • ANOMALOUS REFRACTION INTO FREE SPACE WITH ALL-DIELECTRIC BINARY METAGRATINGS 
    Tsitsas, Nikolaos L.; Valagiannopoulos, Constantinos (PHYSICAL REVIEW RESEARCH, 2020-09-30)
    Steering the incoming photonic power toward unusual directions, not predicted by Snell’s laws of reflection and refraction, is a fundamental operation behind numerous wavefront engineering applications. In this study, strong ...
  • QUANTUM ATMOSPHERE OF REISSNER-NORDSTRÖM BLACK HOLES 
    Ong, Yen Chin; Good, Michael R. R. (PHYSICAL REVIEW RESEARCH, 2020-08-27)
    Hawking radiation originates from a “quantum atmosphere” around black holes, not necessarily from the vicinity of the horizon. We examine and discuss the properties of quantum atmospheres of asymptotically flat Reissne ...
  • MODIFIED SCHWARZSCHILD METRIC FROM A UNITARY ACCELERATING MIRROR ANALOG 
    Good, Michael R.R.; Linder, Eric V. (IOP Publishing Ltd, 2021-04-02)
    We present a modified Schwarzschild solution for a model of evaporation of a black hole with information preservation. By drawing a direct analogy to the quantum pure accelerating mirror (dynamical Casimir effect of a 1D ...
  • TOPOLOGICAL SCATTERING RESONANCES AT ULTRALOW FREQUENCIES 
    Gangaraj, S. Ali Hassani; Valagiannopoulos, Constantinos; Monticone, Francesco (PHYSICAL REVIEW RESEARCH, 2020-05-15)
    At frequencies much lower than the plasma frequency, individual subwavelength plasmonic scatterers are typically far from any scattering resonance, with the exception of some extreme geometries. Contrary to this conventional ...
  • QUANTUM POWER DISTRIBUTION OF RELATIVISTIC ACCELERATION RADIATION: CLASSICAL ELECTRODYNAMIC ANALOGIES WITH PERFECTLY REFLECTING MOVING MIRRORS 
    Zhakenuly, Abay; Temirkhan, Maksat; Good, Michael R. R.; Chen, Pisin (MDPI AG, 2021-04-12)
    We find the quantum power emitted and distribution in 3 + 1-dimensions of relativistic acceleration radiation using a single perfectly reflecting mirror via Lorentz invariance, demonstrating close analogies to point charge ...
  • OPTICAL AND ELECTRICAL PROPERTIES OF GRAPHITE THIN FILMS PREPARED BY DIFFERENT METHODS 
    Solovan, Mykhailo M.; Yamrozyk, H. M.; Brus, Viktor V.; Maryanchuk, Pavlo D. (East European Journal of Physics, 2020-11-19)
    The paper reports on the structural, optical and electrical properties of graphite thin films prepared by two methods: the vacuum-free method "Pencil-on-semiconductor" and via the electron beam evaporation. Graphite thin ...
  • ANOMALOUS DIFFRACTION OF MATTER WAVES WITH MINIMAL QUANTUM METASURFACES 
    Valagiannopoulos, Constantinos (Springer Science and Business Media Deutschland GmbH, 2021-02-06)
    In the last few years, there is a huge upsurge in the number of closed deals regarding quantum technologies for materials, computing, communication and instrumentation. Such a trend has inevitably affected the research ...
  • EFFECTS OF HORIZONS ON ENTANGLEMENT HARVESTING 
    Cong, Wan; Qian, Chen; Good, Michael R.R.; Mann, Robert B. (Journal of High Energy Physics, 2020)
    We study the effects of horizons on the entanglement harvested between two Unruh-DeWitt detectors via the use of moving mirrors with and without strict horizons. The entanglement reveals the sensitivity of the entanglement ...
  • ON CHARGE CARRIER DENSITY IN ORGANIC SOLAR CELLS OBTAINED VIA CAPACITANCE SPECTROSCOPY 
    Vollbrecht, Joachim; Brus, Viktor V. (Advanced Electronic Materials, 2020-09)
    The determination of the voltage-dependent density of free charge carriers via capacitance spectroscopy is considered an important step in the analysis of emerging photovoltaic technologies, such as organic and perovskite ...
  • 2D BI2SE3 VAN DER WAALS EPITAXY ON MICA FOR OPTOELECTRONICS APPLICATIONS 
    Wang, Shifeng; Li, Yong; Ng, Annie; Hu, Qing; Zhou, Qianyu; Li, Xin; Liu, Hao (MDPI, 2020-08-22)
    Bi2Se3 possesses a two-dimensional layered rhombohedral crystal structure, where the quintuple layers (QLs) are covalently bonded within the layers but weakly held together by van der Waals forces between the adjacent ...
  • DISPERSION RELATIONS IN FINITE-BOOST DSR 
    Jafari, Nosratollah; Good, Michael R.R. (Elsevier, 2020-10-10)
    We find finite-boost transformations DSR theories in first order of the Planck length , by solving differential equations for the modified generators. We obtain corresponding dispersion relations for these transformations, ...
  • MOTION OF SPINNING PARTICLES IN NON ASYMPTOTICALLY FLAT SPACETIMES 
    Toshmatov, Bobir; Rahimov, Ozodbek; Ahmedov, Bobomurat; Malafarina, Daniele (Springer Verlag, 2020-07)
    The assumption of asymptotic flatness for isolated astrophysical bodies may be considered an approximation when one considers a cosmological context where a cosmological constant or vacuum energy is present. In this framework ...
  • ON THE PROPERTIES OF A DEFORMED EXTENSION OF THE NUT SPACE-TIME 
    Narzilloev, Bakhtiyor; Malafarina, Daniele; Abdujabbarov, Ahmadjon; Bambi, Cosimo (Springer Verlag, 2020-08)
    We consider a class of space-times given by a stationary extension of the Zipoy–Voorhees metric that was found by Halilsoy. We show that the solutions do not describe rotating sources but must be interpreted, similarly to ...
  • A TOY MODEL FOR A BABY UNIVERSE INSIDE A BLACK HOLE 
    Chakrabarty, Hrishikesh; Abdujabbarov, Ahmadjon; Malafarina, Daniele; Bambi, Cosimo (Springer Verlag, 2020-05)
    We present a dynamical toy model for an expanding universe inside a black hole. The model is built by matching a spherically symmetric collapsing matter cloud to an expanding Friedmann–Robertson–Walker universe through a ...
  • ANALYTICAL INVERSE DESIGN OF POLARIZATION-INSENSITIVE PHOTONIC FILTERS BY TAILORING FABRY-PEROT INTERFERENCE 
    Valagiannopoulos, Constantinos (Institute of Electrical and Electronics Engineers, 2020-07-28)
    Filtering of photonic signals of a certain frequency while suppressing all the others of a specific band for both electromagnetic signal polarizations, becomes possible with a single dielectric layer by properly engineering ...
  • UNIAXIAL FILMS OF MAXIMALLY CONTROLLABLE RESPONSE UNDER VISIBLE LIGHT 
    Tulegenov, Dias; Valagiannopoulos, Constantinos (Nature Research, 2020-08-03)
    The controllability of photonic setups is strongly related to how coherently their outputs react to changes in their inputs; such a generic concept is treated in the case of films comprising multilayers of tilted optical ...
  • NEUTRINO OSCILLATION IN THE Q-METRIC 
    Boshkayev, Kuantay; Luongo, Orlando; Muccino, Marco (EDP Sciences, 2020-10-19)
    We investigate neutrino oscillation in the field of an axially symmetric space-time, employing the so-called q-metric, in the context of general relativity. Following the standard approach, we compute the phase shift ...
  • MODIFICATION OF SILVER NANOWIRE COATINGS WITH INTENSE PULSED ION BEAM FOR TRANSPARENT HEATERS 
    Kaikanov, Marat; Amanzhulov, Bauyrzhan; Demeuova, Gulzat; Akhtanova, Gulnur; Bozheyev, Farabi; Kemelbay, Aidar; Tikhonov, Alexander (MDPI, 2020-10-29)
    : In this report, an improvement of the electrical performance and stability of a silver nanowire (AgNW) transparent conductive coating (TCC) is presented. The TCC stability against oxidation is achieved by coating the ...
  • IMPRINT OF PRESSURE ON CHARACTERISTIC DARK MATTER PROFILES: THE CASE OF ESO0140040 
    Boshkayev, Kuantay; Konysbayev, Talgar; Kurmanov, Ergali; Luongo, Orlando; Muccino, Marco (MDPI, 2020-10-22)
    We investigate the dark matter distribution in the spiral galaxy ESO0140040, employing the most widely used density profiles: the pseudo-isothermal, exponential sphere, Burkert, Navarro-Frenk-White, Moore and Einasto ...
  • PARTICLE SPECTRUM OF THE REISSNER–NORDSTRÖM BLACK HOLE 
    Good, Michael R. R.; Ong, Yen Chin (SpringerOpen, 2020-12-21)
    The Reissner–Nordström black hole – moving mirror correspondence is solved. The beta coefficients reveal that charge makes a black hole radiate fewer particles (neutral massless scalars) per frequency. An old ...