Results 31 to 40 of about 13,955,013 (337)
Energy focusing inside a dynamical cavity [PDF]
, 2000 We study the exact classical solutions for a real scalar field inside a cavity with a wall whose motion is self-consistently determined by the pressure of the field itself.
A. Lambrecht +13 more
core +2 more sources
BioMedical Engineering OnLine, 2005 Background Prostate cancer and benign prostatic hyperplasia are very common diseases in older American men, thus having a reliable treatment modality for both diseases is of great importance.
Smith Nadine, Saleh Khaldon Y
doaj +1 more source
Biosensors, 2019 This paper presents focusing of microparticles in multiple paths within the direction of the flow using dielectrophoresis. The focusing of microparticles is realized through partially perforated electrodes within the microchannel.
Anas Alazzam +5 more
doaj +1 more source
Sea-Air Exchange of Methane in Shallow Inshore Areas of the Baltic Sea
Frontiers in Marine Science, 2021 We report sea-air fluxes of methane in physically and biologically distinct inshore habitats of the Baltic Sea with the goal to establish empirical relationships that allow upscaling of local site-specific flux measurements.
Maysoon Lundevall-Zara +6 more
doaj +1 more source
Comparative Southeast European Studies, 2016 This article addresses the re-negotiation of national belonging among Yugoslav immigrants in (West) Berlin before and during the Yugoslav wars of the 1990s.
Thaden Matthias
doaj +1 more source
A programmable metasurface with dynamic polarization, scattering and focusing control
Scientific Reports, 2016 Diverse electromagnetic (EM) responses of a programmable metasurface with a relatively large scale have been investigated, where multiple functionalities are obtained on the same surface. The unit cell in the metasurface is integrated with one PIN diode,
Huanhuan Yang +9 more
semanticscholar +1 more source
Switchable Polarization Selective Terahertz Wavefront Manipulation in a Graphene Metasurface
IEEE Photonics Journal, 2019 We propose a graphene-based metasurface to investigate the function of switchable polarization selective wave manipulation in THz regime by using the finite-difference time-domain method. The proposed metasurface consists of two layers of graphene arrays,
Yuhui Zhang +4 more
doaj +1 more source
Hyperbolic phonon-polaritons in boron nitride for near-field optical imaging and focusing [PDF]
Nature Communications, 2015 Hyperbolic materials exhibit sub-diffractional, highly directional, volume-confined polariton modes. Here we report that hyperbolic phonon polaritons allow for a flat slab of hexagonal boron nitride to enable exciting near-field optical applications ...
Peining Li +8 more
semanticscholar +1 more source
Quantum Point Contacts and Coherent Electron Focusing [PDF]
, 1990 I. Introduction II. Electrons at the Fermi level III. Conductance quantization of a quantum point contact IV. Optical analogue of the conductance quantization V. Classical electron focusing VI. Electron focusing as a transmission problem VII.
A Kawabata +61 more
core +3 more sources
Subdiffractional focusing and guiding of polaritonic rays in a natural hyperbolic material [PDF]
Nature Communications, 2015 Uniaxial materials whose axial and tangential permittivities have opposite signs are referred to as indefinite or hyperbolic media. In such materials, light propagation is unusual leading to novel and often non-intuitive optical phenomena. Here we report
S. Dai +14 more
semanticscholar +1 more source