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Physics: Recent submissions

  • Judicious distribution of laser emitters to shape the desired far-field patterns 
    Valagiannopoulos, Constantinos; Kovanis, Vassilios (PHYSICAL REVIEW A, 2017-06-06)
    In this paper, motivated by such trends in coupled optical oscillators and applied mathematics methods, we inject an inverse-design approach in the construction of the far field of multiple radiating optical apertures. ...
  • Optimization of Liquid Scintillator Composition 
    Batyrkhanov, Ayan (Nazarbayev University School of Science and Technology, 2017)
    Nowadays, many particle detectors use liquid scintillator (LS) as a detection medium. In particular, Water-based Liquid Scintillator (WbLS) that is a new material currently under development. It is based on the idea of ...
  • Particle detector calibration and performance for Horizon-T cosmic rays experiment 
    Yessenov, Murat (Nazarbayev University School of Science and Technology, 2017)
    Due to large variation of particle density in EAS, a response linearity of each detector needs to be assessed. The number of photon in a photo multiplier tube (PMT) pulse allows inferring the deviation from linearity in ...
  • NUMERICAL INVESTIGATION OF AN EXTERNALLY DRIVEN SPIN DYNAMICS IN SEARCH OF A CLASSICAL CONDENSATION OF WAVES 
    Yegovtsev, Nikolay (Nazarbayev University School of Science and Technology, 2017)
    The following work is a numerical study of a recently discovered Bose-Einstein condensation of magnons at room temperature by purely classical means. The classical Hamiltonian of the system includes exchange and dipolar ...
  • Interaction of Turbulence with Shock Wave 
    Zhaksylykov, Azamat (Nazarbayev University School of Science and Technology, 2017)
    At the final stages of the lives of massive stars supernova explosion occurs. Before that process nuclear shell burning happens and strong turbulent convection arises in between iron core and silicon shell. Turbulence by ...
  • Simulation activities for particle detectors R&D at Horizon-T and HorizonT-KZ cosmic rays experiments 
    Duspayev, Alisher (Nazarbayev University School of Science and Technology, 2017)
    A nature of Ultra-high energy Cosmic Ray is one of the remaining open topics in the field of High Energy Physics. The modern detector systems are being designed and constructed to study this phenomenon. "Horizon-T" that ...
  • Horizon-T Experiment Calibrations – MIP Signal from Scintillator and Glass Detectors 
    Beznosko, Dmitriy; Beremkulov, T.; Iakovlev, A.; Duspayev, A.; Vildanova, M. I.; Uakhitov, T.; Yelshibekov, K.; Yessenov, M.; Zhukov, V.V. (arXiv.org, 2017)
    Horizon-T, a modern Extensive Air Showers (EAS) detector system, is constructed at Tien Shan high-altitude Science Station of Lebedev Physical Institute of the Russian Academy of Sciences at approximately 3340 meters above ...
  • Glass-based charged particle detector performance for Horizon-T EAS detector system 
    Yessenov, M.; Duspayev, A.; Beznosko, Dmitriy; Iakovlev, A.; Vildanova, M.I.; Zhukov, V.V. (arXiv.org, 2017)
    An implementation of a novel of glass-based detector with fast response and wide detection range is needed to increase resolution for ultra-high energy cosmic rays detection. Such detector has been designed and built for ...
  • Anomalous reflection of visible light by all-dielectric gradient metasurfaces 
    Tsitsas, Nikolaos L.; Valagiannopoulos, Constantinos (Journal of the Optical Society of America B, 2017-03-15)
    Plane wave scattering by a planar metasurface composed of two periodically alternating rectangular dielectric rods is considered. A rigorous integral equation methodology is employed for the analysis and the accurate ...
  • Magnified imaging based on non-Hermitian nonlocal cylindrical metasurfaces 
    Savoia, Silvio; Valagiannopoulos, Constantinos; Monticone, Francesco; Castaldi, Giuseppe; Galdi, Vincenzo; Al`u, Andrea (PHYSICAL REVIEW B. American Physical Society, 2017)
    We show that a cylindrical lensing system composed of two metasurfaces with suitably tailored non-Hermitian (i.e., with distributed gain and loss) and nonlocal (i.e., spatially dispersive) properties can perform ...
  • Lowest 2S Electronic Excitations of the Boron Atom 
    Bubin, Sergiy; Adamowicz, Ludwik (PHYSICAL REVIEW LETTERS, 2017-01)
    A theoretical ab initio approach for calculating bound states of small atoms is developed and implemented. The approach is based on finite-nuclear-mass [non-Born-Oppenheimer (non-BO)] nonrelativistic variational calculations ...
  • Breaking the black-body limit with resonant surfaces 
    Valagiannopoulos, Constantinos; Simovski, Constantin R.; Tretyakov, Sergei A. (EPJ Applied Metamaterials, 2017)
    The speed with which electromagnetic energy can be wirelessly transferred from a source to the user is a crucial indicator for the performance of a large number of electronic and photonic devices. We expect that ...
  • Giant enhancement of the controllable in-plane anisotropy of biased isotropic noncentrosymmetric materials with epsilon-negative multilayers 
    Valagiannopoulos, Constantinos; Tsitsas, N. L.; Lakhtakia, A. (Journal of Applied Physics, 2017)
    Giant in-plane anisotropy can be exhibited by a finitely thick periodic multilayer comprising bilayers of an isotropic noncentrosymmetric material and a non-dissipative isotropic medium of negative permittivity, when a ...
  • Multi-mode Waveguides with Tailored Dispersion - a Way for Coherent and Dispersion-Free Propagation of Classical and Quantum Optical Signals 
    Valagiannopoulos, Constantinos; Mandilara, A.; Moiseev, S. A.; Akulin, V. M. (arXiv, 2017-01-12)
    We show how by a tailored breaking of the translational symmetry in waveguides and optical bers one can control chromatic dispersions of the individual modes at any order and thereby overcome the problem of coherent ...
  • Line intensity measurements of methane’s ν3-band using a cw-OPO 
    Zondy, Jean-Jacques; Souza, Marco Polo Moreno de; Cadoret, Malo; Jahjah, Mohammad; Nguyen, Linh; Cruz, Flavio C. (Applied Physics B: Lasers and Optics, 2014)
    We report on absolute line strength measurements of P(1), R(0) and R(1) singlet lines in the 3:3 μm ν3 (C–H stretching) band of methane 12CH4 at referencetemperature T = 296 K. Line strength measurements are performed at ...
  • Shock-turbulence interaction in core-collapse supernovae 
    Abdikamalov, Ernazar; Zhaksylykov, Azamat; Radice, David; Berdibek, Shapagat (Monthly Notices of the Royal Astronomical Society, 2016-10-01)
    Nuclear shell burning in the final stages of the lives of massive stars is accompanied by strong turbulent convection. The resulting fluctuations aid supernova explosion by amplifying the non-radial flow in the post-shock ...
  • Scattering properties of PT- symmetric layered periodic structures 
    Shramkova, O. V.; Tsironis, G. P. (Journal of Optics (United Kingdom), 2016-10-01)
    The optical properties of PT-symmetric periodic stacks of the layers with balanced loss and gain are examined. We demonstrate that the tunnelling phenomenon in periodic structures is connected with excitation of surface ...
  • Robust chimera states in SQUID metamaterials with local interactions 
    Hizanidis, J.; Lazarides, N.; Tsironis, G. P. (Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 2016-09-27)
    We report on the emergence of robust multiclustered chimera states in a dissipative-driven system of symmetrically and locally coupled identical superconducting quantum interference device (SQUID) oscillators. The "snakelike" ...
  • Mirror reflections of a black hole 
    Good, Michael R. R.; Anderson, Paul R.; Evans, Charles R. (Physical Review D - Particles, Fields, Gravitation and Cosmology, 2016-09-12)
    An exact correspondence between a black hole and an accelerating mirror is demonstrated. It is shown that for a massless minimally coupled scalar field, the same Bogolubov coefficients connecting the "in" and "out" states ...
  • LiGaSe2 optical parametric oscillator pumped by a Q-switched Nd:YAG laser 
    Zondy, Jean-Jacques; Vedenyapin, V.; Boyko, A.; Kolker, Dmitri; Isaenko, L.; Lobanov, S.; Kostyukova, N.; Yelisseyev, A.; Petrov, V. (Laser Physics Letters, 2016-01-01)
    Optical parametric oscillation is demonstrated for the first time with the chalcogenide nonlinear crystal LiGaSe2 pumped by a nanosecond Nd:YAG laser. Angle tuning provides coverage of the 4.8–9.9 μm spectral range in the ...