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We propose a new method to measure the mass of large-scale filaments in galaxy redshift surveys. The method is based on the fact that the mass per unit length of isothermal filaments depends only on their transverse velocity dispersion.…

Astrophysics · Physics 2009-10-28 Daniel J. Eisenstein , Abraham Loeb , Edwin L. Turner

The ability to manipulate optical fields and the energy flow of light is central to modern information and communication technologies, as well as quantum information processing schemes. However, as photons do not possess charge, controlling…

Near-fields around nanophotonic structures and waveguides can be used to optically interface particles ranging from atoms and molecules to microscopic biological and synthetic particles. Due to the strong, non-linear dependence of the…

1-loop quantum corrections are shown to induce large effects on the refraction index n inside a graphene strip in the presence of an external magnetic field B orthogonal to it. To this purpose, we use the tools of Quantum Field Theory to…

High Energy Physics - Phenomenology · Physics 2014-07-09 Olivier Coquand , Bruno Machet

A photon carries a momentum of, so one may anticipate light to "push" on any object standing in its path via the scattering force. In the absence of intensity gradient, using a light beam to pull a particle backwards is counter intuitive.…

Optics · Physics 2011-07-28 Jun Chen , Jack Ng , Zhifang Lin , C. T. Chan

Miniaturized mechanical resonators have proven to be excellent force sensors. However, they usually rely on resonant sensing schemes, and their excellent performance cannot be utilized for the detection of static forces. Here, we report on…

Instrumentation and Detectors · Physics 2018-08-15 Erik Hebestreit , Martin Frimmer , René Reimann , Lukas Novotny

For a long time transverse and longitudinal optical forces are used for non-contact and noninvasive manipulation of small individual particles. The following question arises: What is the impact of these forces on the ensemble of thousand…

Optics · Physics 2021-05-26 Lubomir Kovachev

The structure and interactions of coated silica nanoparticles have been studied in water using molecular dynamics simulations. For 5 nm diameter amorphous silica nanoparticles we studied the effects of varying the chain length and grafting…

Soft Condensed Matter · Physics 2014-05-22 K. Michael Salerno , Ahmed E. Ismail , J. Matthew D. Lane , Gary S. Grest

It is shown that a detailed sub microscopic consideration denies the wave-particle duality for both material particles and field particles, such as photons. In the case of particles, their \psi-wave function is interpreted as the particle's…

General Physics · Physics 2014-07-29 Volodymyr Krasnoholovets

The reflection and transmission of a few-cycle femtosecond Ti:Sa laser pulse impinging on a metal nano-layer have been analysed. The thickness of the layer was assumed to be of order of 2-10 nm, and the metallic free electrons were…

Plasma Physics · Physics 2007-05-23 Sandor Varro

It is shown that the polarization forces in a weakly ionized plasma lead to a substantial increase in the fluxes of neutral atoms and molecules to the surface of charged nanoparticles. Thus, the nanoparticles can change thermal balance due…

Plasma Physics · Physics 2016-12-30 M. N. Shneider

Many nanophotonic applications require precise control and characterization of electromagnetic field properties at the nanoscale. The chiral properties of the field are among its key characteristics, yet measurement of optical chirality at…

Optics · Physics 2022-02-18 Abid Anjum Sifat , Filippo Capolino , Eric O. Potma

It has been recently reported that elastic waves induced by nanosecond light pulses can be used to drive nano-motion of micro-objects on frictional solid interfaces, a challenging task for traditional techniques using tiny optical force. In…

Optics · Physics 2023-02-10 Wei Lyu , Weiwei Tang , Wei Yan , Min Qiu

The spin transfer torque is a phenomenon in which angular momentum of a spin polarized electrical current entering a ferromagnet is transferred to the magnetization. The effect has opened a new research field of electrically driven…

Materials Science · Physics 2012-05-07 P. Nemec , E. Rozkotova , N. Tesarova , F. Trojanek , E. De Ranieri , K. Olejnik , J. Zemen , V. Novak , M. Cukr , P. Maly , T. Jungwirth

Optical forces in guided-wave nanostructures have recently been proposed as an effective means of mechanically actuating and tuning optical components. In this work, we study the properties of a photonic crystal optomechanical cavity…

Optics · Physics 2011-10-13 Ryan M. Camacho , Jasper Chan , Matt Eichenfield , Oskar Painter

We argue that while the experiment of Remez et al. is interesting and its conclusions may well be correct, the observed lack of dependence of the measured distributions on the electron's transverse coherence length should have been expected…

Quantum Physics · Physics 2022-03-23 D. V. Karlovets , A. M. Pupasov-Maksimov

We report on rotating an optically trapped silica nanoparticle in vacuum by transferring spin angular momentum of light to the particle's mechanical angular momentum. At sufficiently low damping, realized at pressures below $10^{-5}$ mbar,…

We theoretically study the electrical, thermal and thermoelectric transport properties of graphene nanoribbons under torsional deformations. The modelling follows a nonequilibrium Green's function approach in the ballistic transport regime,…

Mesoscale and Nanoscale Physics · Physics 2017-06-07 Aleandro Antidormi , Miquel Royo , Riccardo Rurali

Intense femtosecond laser pulses interacting with solids can drive electrons to relativistic energies, enabling miniaturized particle accelerators and bright extreme-ultraviolet light sources. In-situ space-time control of these electrons…

Plasma Physics · Physics 2024-11-27 Ankit Dulat , Sk Rakeeb , Sagar Dam , Amit D. Lad , Yash M. Ved , Sergey Kruk , G. Ravindra Kumar

Casimir forces are of fundamental interest because they originate from quantum fluctuations of the electromagnetic field. Apart from controlling the Casimir force via the optical properties of the materials, a number of novel geometries…

Quantum Physics · Physics 2017-01-11 L. Tang , M. Wang , C. Y. Ng , M. Nikolic , C. T. Chan , A. W. Rodriguez , H. B. Chan
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