Results 31 to 40 of about 663,427 (287)
Adiabatic nano-focusing of plasmons by sharp metallic wedges [PDF]
Applied Physics B, 2006 In this paper, we demonstrate the possibility of efficient adiabatic nano-focusing of plasmons by a sharp triangular metal wedge. The geometrical optics approach and the approximation of continuous electrodynamics are used for the analysis. In particular, it is demonstrated that both the phase and group velocities of an incident anti-symmetric (with ...
Gramotnev, Dmitri, Vernon, Kristy
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Photonics, 2023 We have demonstrated efficiency of employing the ABCD matrix approach to transform higher-order structured Laguerre–Gaussian (sLG) beams into structurally stable astigmatic sLG (asLG) beams, highlighting their dynamics at propagating.
Alexander Volyar +3 more
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Extraordinary focusing of sound above a soda can array without time reversal [PDF]
, 2015 Recently, Lemoult et al. [Phys. Rev. Lett. 107, 064301 (2011)] used time reversal to focus sound above an array of soda cans into a spot much smaller than the acoustic wavelength in air.
Fang, Nicholas +6 more
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Visualization Characteristics of a Sharp Focusing Schlieren Method.
Journal of the Visualization Society of Japan, 2000 A sharp focusing schlieren system gives a means for observing any cross section of a flow field, which is perpendicular to the test beam axis of the optical system. This is impossible for a conventional schlieren system. In this study, a sharp focusing schlieren system was designed with referring to the Weinsten's system to investigate visualization ...
Yutaka YAMAGUCHI +3 more
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Sharp Oracle Inequalities for Aggregation of Affine Estimators [PDF]
, 2012 We consider the problem of combining a (possibly uncountably infinite) set of affine estimators in non-parametric regression model with heteroscedastic Gaussian noise.
Dalalyan, Arnak, Salmon, Joseph
core +6 more sources
, 2009 Recently Merlin and co-workers demonstrated, both theoretically and in the microwave range experimentally, subwavelength focusing of evanescent waves by patterned plates.
Bozhevolnyi +13 more
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Scattering below ground state of 3D focusing cubic fractional Schordinger equation with radial data
, 2017 The aim of this note is to adapt the strategy in [4][See,B.Dodson, J.Murphy, a new proof of scattering below the ground state for the 3D radial focusing cubic NLS, arXiv:1611.04195 ] to prove the scattering of radial solutions below sharp threshold for ...
Sun, Chenmin +3 more
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Selection and focusing of higher-order modes in a CW waveguide terahertz laser
Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2022 Background: The problems of selection and focusing of higher order modes of a dielectric waveguide laser are considered. The proposed and investigated scheme of mode selection in waveguide quasi-optical resonators can be used in the development and ...
O. V. Gurin +7 more
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Vacuum Fluctuations and the Small Scale Structure of Spacetime
, 2011 We show that vacuum fluctuations of the stress-energy tensor in two-dimensional dilaton gravity lead to a sharp focusing of light cones near the Planck scale, effectively breaking space up into a large number of causally disconnected regions.
Carlip, S. +2 more
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A sharp condition for scattering of the radial 3d cubic nonlinear Schroedinger equation
, 2008 We consider the problem of identifying sharp criteria under which radial $H^1$ (finite energy) solutions to the focusing 3d cubic nonlinear Schr\"odinger equation (NLS) $i\partial_t u + \Delta u + |u|^2u=0$ scatter, i.e. approach the solution to a linear
C. Kenig +21 more
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