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Detailed two dimensional particle-in-cell (PIC) simulations and numerical calculations of electron density profiles, based on a simplified model, were performed to show for the first time that underdense plasma, induced by two pairs of…

Optics · Physics 2015-06-18 Rotem Kupfer , Boris D. Barmashenko , Ilana Bar

Using nanometer spatial resolution electron-energy loss spectroscopy (EELS), energy dispersive X-ray spectroscopy (EDS), and cathodoluminescence (CL) mapping, we demonstrate that Au alloys containing a poor plasmonic metal (Pd) can…

To enable an exploration of the initiation mechanism of nanosecond laser damage on a potassium dihydrogen phosphate (KDP) surface, a defect-assisted energy deposition model is developed that involves light intensity enhancement and a…

Applied Physics · Physics 2021-09-08 Hao Yang , Mingjun Chen , Jian Cheng , Zhichao Liu , Linjie Zhao , Qi Liu , Chao Tan , Jian Wang

Effective surface-passivation of PbS nanocrystals in aqueous colloidal solution has been achieved following treatment with CdS precursors. The resultant photoluminescent emission displays two distinct components, one originating from the…

Materials Science · Physics 2009-11-10 M. J. Fernee , J. Warner , A. Watt , S. Cooper , N. R. Heckenberg , H. Rubinsztein-Dunlop

It is demonstrated that persistent-photoconductivity (PPC), well-studied in lightly-doped semiconductors, is observable in GeSbTe compounds using infrared excitation at cryogenic temperatures. The low level of energy-flux necessary to…

Strongly Correlated Electrons · Physics 2015-03-26 Z. Ovadyahu

The light absorption and transmission of monolayer MoS$_{2}$ in a one-dimensional defective photonic crystal (d-1DPC) is theoretically investigated. The study shows that the strong interference effect decreases photon density in particular…

By implementing the nonlinear Poisson-Boltzmann theory in a cell model, we theoretically investigate the influence of polyelectrolye gel permeability on ion densities and pH deviations inside the cavities of ionic microcapsules. Our…

Soft Condensed Matter · Physics 2015-07-15 Qiyun Tang , Alan R. Denton

We report on Doppler-free laser spectroscopy in a Cs vapor cell using a dual-frequency laser system tuned on the Cs D$_1$ line. Using counter-propagating beams with crossed linear polarizations, an original sign-reversal of the usual…

Atomic Physics · Physics 2016-05-31 Moustafa Abdel Hafiz , Grégoire Coget , Emeric De Clercq , Rodolphe Boudot

Using a model methane-like chiral system, we theoretically demonstrate a possibility to access photoelectron circular dichroism (PECD) by a single experiment with two overlapping laser pulses of carrier frequencies $\omega$ and $2\omega$,…

Atomic and Molecular Clusters · Physics 2018-12-20 Philipp V. Demekhin , Anton N. Artemyev , Alexander Kastner , Thomas Baumert

A long existing issue for microdisk lasers is the small spontaneous emission coupling rate ({\beta}) in microdisk,. We found that it is due to the coupling of emitter spontaneous emission into competing Fabry-Perot (FP) modes in the…

Optics · Physics 2011-12-09 Yi-Kuei Wu , Xin Tu , Yi-Hao Chen , L. Jay Guo

We present the results of experiments on synthesis of ZnO nanoclusters by reactive pulsed laser deposition (PLD). The nanoclusters were formed and crystallized in the gas phase and deposited on SiO2 substrates. The nanostructured films were…

Materials Science · Physics 2007-05-23 Igor Ozerov , Dimitri Nelson , Alexander V. Bulgakov , Wladimir Marine , Marc Sentis

In this paper the characteristic matrix method is used to study the propagation of electromagnetic waves through one-dimensional lossy photonic crystals composed of negative and positive refractive index material layers with symmetric and…

We develop a theory for light scattering from a disordered layer of metal nanoparticles resting on a sample. Averaging over different disorder realizations is done by a coherent potential approximation. The calculational scheme takes into…

Condensed Matter · Physics 2007-05-23 Peter Johansson

Liquid crystal elastomers (LCEs) containing light-sensitive molecules exhibit large reversible deformation when subjected to illumination. Here, we investigate the role of optical penetration depth on this photomechanical response. We…

Soft Condensed Matter · Physics 2023-10-06 Ameneh Maghsoodi , Kaushik Bhattacharya

We theoretically study the influence of laser polarization in inelastic scattering of electrons by hydrogen atoms in the presence of a circularly polarized laser field in the domain of field strengths below $10^{7}$ V/cm and high projectile…

Atomic Physics · Physics 2023-06-16 Gabriela Buică

We study the beaming effect of light for the case of increased-index photonic crystal (PhC) waveguides, formed through the omission of low-dielectric media in the waveguide region. We employ the finite-difference time-domain numerical…

Optics · Physics 2009-11-11 Steven K. Morrison , Yuri S. Kivshar

Dynamic control of laser emission direction is crucial for developing compact and reconfigurable nanophotonic devices. In this work, we numerically present a plasmonic nanolaser (PNL) integrated with a voltage-controlled liquid crystal (LC)…

Optics · Physics 2026-01-06 Md. Rasel Parvez , Muhammad Anisuzzaman Talukder

We study photopolymerization in a low-molecular weight liquid crystal with non-uniform director gradients. Phase separation results in spatially non-uniform distribution of polymer density controlled by the distorted nematic matrix.…

Soft Condensed Matter · Physics 2007-05-23 D. Voloschenko , O. P. Pishnyak , S. V. Shiyanovskii , O. D. Lavrentovich

The base for this manuscript was laid down by the studies carried out in the article by Senyuk B, et. al. Proceedings of SPIE. 2005; 5936: 59360W-1-9. In the present manuscript, a planar layer of the photosensitive cholesteric, based on the…

Soft Condensed Matter · Physics 2018-04-02 Igor Gvozdovskyy

We present low-dimensional functionalization and characterization of electron density of states (DOS) using highly correlated/precisely guided proton beam trajectories and a silicon nanocrystal as a target, representing at a same time a…

Quantum Physics · Physics 2015-04-21 Vesna Berec