Results 261 to 270 of about 7,955,705 (309)
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1997
Periodic structures play an important role in the interaction of electrons with waves since they support harmonics of phase-velocity smaller than \( c \) and with an adequate design, this velocity can be set equal to the average velocity of the electrons.
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Periodic structures play an important role in the interaction of electrons with waves since they support harmonics of phase-velocity smaller than \( c \) and with an adequate design, this velocity can be set equal to the average velocity of the electrons.
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Periodic doping structure in GaAs
Progress in Crystal Growth and Characterization, 1979Abstract A new type of superlattice consisting of a periodic sequence of ultrathin p- and n- doped semiconductor layers, possibly with intrinsic (i-) layers in between, is considered. In addition to the features related to the subband formation, as known from the study of the familiar heterostructure superlattices of the type GaxAl1−xAs, crystals ...
G.H. Döhler, K. Ploog
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Structures and Superstructures in Periodical Polynucleotides
1986A renewed attention has been focused on the structural aspects of DNA in the last few years. Such revival of interest starting from the elucidation of the structure of some synthetic oligonucleotides is going beyond toward the understanding of the basic molecular mechanisms of control of genetic information, which are strictly correlated to the ...
DE SANTIS, Pasquale +3 more
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A periodic structure mimics a metamaterial
Journal of the Optical Society of America A, 2007We show that properties attributed to planar metamaterials that support resonances due to an appropriately shaped unit cell can also be identified in a medium that exhibits a resonance evoked by its period only. By choosing a subwavelength period, the effective material parameters of such a medium can be retrieved from the complex reflected and ...
Rockstuhl, Carsten +2 more
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Flow acoustics in periodic structures
Ultrasonics, 2005A recent paper [A.A. Krokhin, J. Arriaga, L.N. Gumen, Speed of sound in periodic elastic composites, Phys. Rev. Lett. 91 (2004) 264302-1-4] addresses the speed of sound in periodic elastic composites (phononic crystals) with particular emphasis to the case where air bubbles are present in water and arranged periodically.
Willatzen, Morten, Lew Yan Voon, L.C.
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Multidimensional period doubling structures
Acta Crystallographica Section A Foundations and Advances, 2016This paper develops the formalism necessary to generalize the period doubling sequence to arbitrary dimension by straightforward extension of the substitution and recursion rules. It is shown that the period doubling structures of arbitrary dimension are pure point diffractive. The symmetries of the structures are pointed out.
Jeong Yup, Lee +2 more
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Resonances and Scattering by a Periodic Structure
Russian Journal of Mathematical PhysicszbMATH Open Web Interface contents unavailable due to conflicting licenses.
Borisov, D. I., Fedotov, A. A.
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Defect Dragging in Periodic Structures
2007Waves or pulses propagating along periodic structures cause thermally controlled transport of diffusing defects. The dragging waves/pulses may modulate the amplitude of the substrate as well as the geometry of the boundaries where the defects are confined.
BORROMEO, Marcello, Marchesoni F.
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A Periodic Stage-Structure Model
Applied Mathematics Letters, 2003 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhengqiu Zhang, Xianwu Zheng
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Permeability relation for periodic structures
Magnetic Resonance Imaging, 1998The permeability relation for periodic porous media is studied with respect to other petrophysical parameters such as formation factor, porosity, surface-to-volume ratio, and nuclear magnetic resonance (NMR) relaxation time. All these quantities were computed for periodic structures of simple, body-centered, and face-centered cubic arrays of touching ...
K J, Dunn, G A, LaTorraca, D J, Bergman
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