نتایج جستجو برای: metallic beams

تعداد نتایج: 71796  

2012
Bonnie Wade Paolo Feraboli

A wide range of composite material forms are finding use in today’s aerospace, automotive, and other transportation industry segments. The Boeing 787 commercial airliner, unveiled in 2007, features over 50% carbon fiber composites by structural weight, while the entire structure of the Lamborghini Sesto Elemento supercar, unveiled in 2011, is made exclusively from carbon fiber composites [1-2]....

Journal: :Optics express 2015
Xiao Zhang Fangwei Ye Yaroslav V Kartashov Xianfeng Chen

We study stimulated mode conversion and dynamics of Rabi-like oscillations of weights of guided modes in deeply subwavelength guiding structures, whose dielectric permittivity changes periodically in the direction of light propagation. We show that despite strong localization of the fields of eigenmodes on the scales below the wavelength of light, even weak longitudinal modulation couples modes...

Journal: :روش های عددی در مهندسی (استقلال) 0
محمود سلیمی و حسن خادمی زاده m. salimi and h. khademizadeh

in this paper, collapse behavior of simple and reinforced thin-walled channel- section beams, subjected to three- point bending, is investigated. many simple channel- section beams of different geometry and some reinforced ones were tested, and their strengths after collapse were obtained thoroughly. since the available theories in this area are complicated and little attention has been paid to...

Journal: :Optics express 2014
M Albani S C Pavone M Casaletti M Ettorre

The focusing capabilities of an inward cylindrical traveling wave aperture distribution and the non-diffractive behaviour of its radiated field are analyzed. The wave dynamics of the infinite aperture radiated field is clearly unveiled by means of closed form expressions, based on incomplete Hankel functions, and their ray interpretation. The non-diffractive behaviour is also confirmed for fini...

2010
R Huang C A Taylor

The novel apparatus described here was developed to investigate the thermo-mechanical behavior of metallic films on a substrate by acquiring the wafer curvature. It comprises an optical module producing and measuring an array of parallel laser beams, a high resolution scanning stage, a rapid thermal processing (RTP) chamber and several accessorial gas control modules. Unlike most traditional sy...

Journal: :Nano letters 2006
Lubos Jankovic Dimitrios Gournis Pantelis N Trikalitis Imad Arfaoui Tristan Cren Petra Rudolf Marie-Hélène Sage Thomas T M Palstra Bart Kooi Jeff De Hosson Michael A Karakassides Konstantinos Dimos Aliki Moukarika Thomas Bakas

Superconducting low dimensional systems are the natural choice for fast and sensitive infrared detection, because of their quantum nature and the low-noise, cryogenic operation environment. On the other hand, monochromatic and coherent electron beams, emitted from superconductors and carbon-based nanostructured materials, respectively, are significant for the development of electron optical sys...

2015
Euclides Almeida Yehiam Prior

Optimizing the shape of nanostructures and nano-antennas for specific optical properties has evolved to be a very fruitful activity. With modern fabrication tools a large variety of possibilities is available for shaping both nanoparticles and nanocavities; in particular nanocavities in thin metal films have emerged as attractive candidates for new metamaterials and strong linear and nonlinear ...

Journal: :Optics express 2007
Miguel Beruete Mario Sorolla Miguel Navarro-Cía Francisco Falcone Igor Campillo Vitaliy Lomakin

Metallic plates embedded between dielectric slabs and perforated by rectangular arrays of subwavelength holes with a dense periodicity in one of the directions support extraordinary transmission (ET) phenomena, viz. strong peaks in the transmittance frequency dependence. Stacks of such perforated plates support ET phenomena with propagation along the stack axis that is characterized by the left...

2014
Yun Bo Li Xiang Wan Ben Geng Cai Qiang Cheng Tie Jun Cui

We propose a method to control electromagnetic (EM) radiations by holographic metasurfaces, including to producing multi-beam scanning in one dimension (1D) and two dimensions (2D) with the change of frequency. The metasurfaces are composed of subwavelength metallic patches on grounded dielectric substrate. We present a combined theory of holography and leaky wave to realize the multi-beam radi...

Journal: :Nature communications 2016
Lukas Zhao Marcin Konczykowski Haiming Deng Inna Korzhovska Milan Begliarbekov Zhiyi Chen Evangelos Papalazarou Marino Marsi Luca Perfetti Andrzej Hruban Agnieszka Wołoś Lia Krusin-Elbaum

Topological insulators are potentially transformative quantum solids with metallic surface states which have Dirac band structure and are immune to disorder. Ubiquitous charged bulk defects, however, pull the Fermi energy into the bulk bands, denying access to surface charge transport. Here we demonstrate that irradiation with swift (∼2.5 MeV energy) electron beams allows to compensate these de...

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