Understanding the variation of nanofluidic behavior in the presence of an external electric field is critical for controlling and designing nanofluidic devices. By studying the critical infiltration pressure of liquids into hydrophobic nanopores using molecular dynamics (MD) simulations and experiments, important insights can be gained on the variation of the effective liquid-solid interfacial ...

Conditions for achieving ‘‘optical asymmetric synthesis,’’ an example of controlled chiral symmetry breaking, using the electric-dipole light-field interaction are derived. These include scenarios in which neither the medium nor the light is chiral by itself. Specifically, parity requirements are used to show that any optical scenario in which the dynamics of the molecule depends on the overall...

We report the observation of the circular ac Hall effect where the current is solely driven by the crossed ac electric and magnetic fields of circularly polarized radiation. Illuminating an unbiased monolayer sheet of graphene with circularly polarized terahertz radiation at room temperature generates--under oblique incidence--an electric current perpendicular to the plane of incidence, whose s...

Based on electronic structure calculations and theoretical analysis, we predict the (111) thin films of the SnTe class of three-dimensional (3D) topological crystalline insulators (TCIs) realize the quantum spin Hall phase in a wide range of thicknesses. The nontrivial topology originates from the intersurface coupling of the topological surface states of TCIs in the 3D limit. The intersurface ...

Domain wall motion during polarization switching in ferroelectric thin films is fundamentally important and poses challenges for both experiments and modeling. We have visualized the switching of a Pb(Zr, Ti)O(3) capacitor using time-resolved x-ray microdiffraction. The structural signatures of switching include a reversal in the sign of the piezoelectric coefficient and a change in the intensi...

If a laser beam is to have radial transverse polarization, the transverse electric must vanish on the symmetry axis, which is charge free. However, we can expect a nonzero longitudinal electric field on the axis, considering that the rays of the beam that converge on its focus each has polarization transverse to the ray, and hence the projections of their electric fields onto the axis all have ...

We consider the optical dipole potential energy, which arises from interaction of a two-level atom with circularly polarized Laguerre-Gaussian laser beam small waist. The is characterized by existence longitudinal electric field component responsible for appearance chiral term in energy. This reverses sign if either winding number or wave polarization sign. propose scheme bi-chromatic vortex re...

By resolving the Riemann curvature relative to a unit timelike vector into electric and magnetic parts, we consider duality relations analogous to the electromagnetic theory. It turns out that the duality symmetry of the Einstein action implies the Einstein vacuum equation without the cosmological term. The vacuum equation is invariant under interchange of active and passive electric parts givi...

It is presented the development and application of an instrumented glove with photo-electric devices to detect four finger positions during a flexion movement to differentiate the deaf person hand positions (queiremas) that uses the mexican sign language (MSL) to communicate.