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By using multi-dimensional particle-in-cell simulation, we present a new regime of stable proton beam acceleration which takes place when a two-specie shaped foil is illuminated by a circularly polarized laser pulse. It is observed that the…

Plasma Physics · Physics 2015-03-13 T. P. Yu , A. Pukhov , G. Shvets , M. Chen

We prove that it is impossible to distinguish two spatially coinciding fluorescent molecules from a single rotating molecule using polarization-sensitive imaging, even if one modulates the polarization of the illumination or the detection…

Optics · Physics 2025-03-11 Yiyang Chen , Yuanxin Qiu , Matthew D. Lew

The linear optical absorption spectra of three isomers of planar boron cluster B$_{13}$ are calculated using time-dependent spin-polarized density functional approach. The geometries of these cluster are optimized at the B3LYP/6-311+G*…

Atomic and Molecular Clusters · Physics 2013-02-12 Ravindra Shinde , Meenakshi Tayade

Optical metasurfaces have great potential to form the platform for manipulation of surface waves. A plethora of advanced surface-wave phenomena utilizing negative refraction, self-collimation and channeling of 2D waves can be realized…

The two-photon decay in hydrogen-like ions is investigated within the framework of second order perturbation theory and Dirac's relativistic equation. Special attention is paid to the angular correlation of the emitted photons as well as to…

Atomic Physics · Physics 2014-10-23 P. Amaro , F. Fratini , S. Fritzsche , P. Indelicato , J. P. Santos , A. Surzhykov

Molecular segregation in methanol-water mixtures is studied across a wide concentration range as a function of temperature and pressure. Cluster distributions obtained from both neutron diffraction and molecular dynamics simulations point…

Soft Condensed Matter · Physics 2009-11-10 L. Dougan , R. Hargreaves , S. P. Bates , J. L. Finney , V. Reat , A. K. Soper , J. Crain

We report on an energy-sensitive imaging detector for studying the fragmentation of polyatomic molecules in the dissociative recombination of fast molecular ions with electrons. The system is based on a large area (10 cm x 10 cm)…

We propose a new wide-field imaging method that exploits the Localized Surface Plasmon Resonance phenomenon to produce super-resolution images with an optical microscope equipped with a custom design polarization analyzer module. In this…

Instrumentation and Methods for Astrophysics · Physics 2023-10-09 Andrey Alexandrov , Takashi Asada , Fabio Borbone , Valeri Tioukov , Giovanni De Lellis

Spectroscopies utilizing free electron beams as probes offer detailed information on the reciprocal-space excitations of 2D materials such as graphene and transition metal dichalcogenide monolayers. Yet, despite the attention paid to such…

Materials Science · Physics 2024-02-08 Andrew W. Rossi , Marc R. Bourgeois , Caleb Walton , David J. Masiello

Absorption imaging with quasi-resonant laser light is a commonly used technique to probe ultra-cold atomic gases in various geometries. Here we investigate some non-trivial aspects of this method when it is applied to in situ diagnosis of a…

Quantum Gases · Physics 2015-06-03 L. Chomaz , L. Corman , T. Yefsah , R. Desbuquois , J. Dalibard

Strong quasi-adiabatic laser alignment of the indole-water-dimer clusters, an amino-acid chromophore bound to a single water molecule through a hydrogen bond, was experimentally realized. The alignment was visualized through ion and…

Chemical Physics · Physics 2018-07-31 Sebastian Trippel , Joss Wiese , Terry Mullins , Jochen Küpper

We present the development and performance of a newly built recoil ion momentum spectrometer to study the fragmentation dynamics of ionized molecules. The spectrometer is based on the two-stage Wiley-McLaren geometry and satisfies both time…

Atomic Physics · Physics 2022-11-23 Avijit Duley , Rohit Tyagi , Sandeep B. Bari , A. H. Kelkar

Isothermal crystallization of the mono-hydroxyl alcohol n-butanol was studied with dielectric spectroscopy in real time. The crystallization was carried out using two different sample cells at 15 temperatures between 120 K and 134 K. For…

Soft Condensed Matter · Physics 2015-10-28 M. H. Jensen , C. Alba-Simionesco , K. Niss , T. Hecksher

We consider the problem of two-photon cooperative emission in systems of two-level atoms. Two physically distinct regimes are analyzed. First, we investigate the case of a small number of atoms. We study the evolution of two-photon super-…

Quantum Physics · Physics 2025-05-22 Wenxuan Xie , Imran Mirza , John C Schotland

The supersolid phase of a dipolar Bose-Einstein condensate has an intriguing excitation spectrum displaying a band structure. Here, the dressing of an impurity in a one-dimensional dipolar supersolid with the excitations of the supersolid…

Quantum Gases · Physics 2025-03-03 Laurent H. A. Simons , Michiel Wouters , Jacques Tempere

We demonstrate that a near-dissociation photoassociation resonance can be used to create a deeply bound molecular sample of ultracold NaCs. To probe the resulting vibrational distribution of the sample, we use a new technique that can be…

Photon splitting due to vacuum polarization in a laser field is considered. Using an operator technique, we derive the amplitudes for arbitrary strength, spectral content and polarization of the laser field. The case of a monochromatic…

High Energy Physics - Phenomenology · Physics 2007-09-08 A. Di Piazza , A. I. Milstein , C. H. Keitel

The development of intense high-energy radiation sources and the improvement of techniques for detecting charged fragments have made possible experiments on multiple ionization of a molecule with registration of the momentum and charge of…

We present a novel approach to precisely synthesize arbitrary polarization states of light with a high modulation bandwidth. Our approach consists of superimposing two laser light fields with the same wavelength, but with opposite circular…

The photon-ion merged-beams technique was used at a synchrotron light source for measuring absolute cross sections of double and triple photodetachment of O$^{-}$ ions. The experimental photon energy range of 524-543 eV comprised the…

Atomic Physics · Physics 2016-10-07 S. Schippers , R. Beerwerth , L. Abrok , S. Bari , T. Buhr , M. Martins , S. Ricz , J. Viefhaus , S. Fritzsche , A. Müller