Phase Of Interference Pattern Research Articles

Laser-driven surface thermocapillary waves in isotropic and anisotropic liquids

Theoretical and experimental results on thermocapillary hydrodynamic surface waves induced in liquids by travelling spatially periodical distribution of light intensity are reported. The phase of local elevation in capillary waves is close to the phase of interference pattern when frequency is far from zero and from eigen frequency of free capillary waves. This phase difference is exactly π/2 for zero frequency.

New Approach to Test a Neutron Electroneutrality by the Spin Interferometry Technique

Abstract New method to measure a neutron electric charge is described. The main idea is to use SESANS technique, which provides a spacial splitting of neutron onto two eigenstates with different projection of spin on magnetic field. After passing through working area with applied uniform electric field E these two eigenstates are coupled back. Therefore, the phase of interference pattern, i.e. azimuthal spin direction, is defined by phase difference of two neutron eigenstates accumulated in the working area. This phase will be determined by the nonzero neutron electric charge. Preliminary estimations demonstrate that using this technique can improve the current constrain on neutron electric charge at least on one order of magnitude.

EXCITATION OF SURFACE CAPILLARY WAVES BY SPATIALLY PERIODICAL LASER RADIATION

In this paper we report theoretical results on thermocapillary hydrodynamic waves induced by travelling spatially periodical distribution of light intensity. The phase of the local elevation in capillary waves is close to the phase of interference pattern when the frequency is far from zero and from eigenfrequency of free capillary waves. This phase difference is exactly π/2 for zero frequency. Predicted thermocapillary mechanism of induced surface waves and boundary disturbances can have an important role for surface relief grating in the polymer-dispersed liquid crystals.