Webb19 apr. 2007 · We present an analytic theory of the diffraction of (matter) waves by a lattice in the "quasi-Bragg" regime, by which we mean the transition region between the long-interaction Bragg and "channelling" regimes and the short-interaction Raman-Nath regime. The Schroedinger equation is solved by adiabatic expansion, using the conventional … WebbWe give a detailed description of an atomic interferometer in which a gaussian beam of two-level atoms interacts with two separated standing waves. We consider specifically a situation where the atom-field interaction is sufficiently off-resonance that spontaneous emission can be ignored, and the Raman-Nath regime which neglects phase-matching ...
Acousto-optic systems for advanced microscopy - IOPscience
Webb30 aug. 2024 · In this paper, we describe an optical detection method for the characterization of pulsed ultrasound based on acousto-optic interaction. We deduce the relationship between the ultrasound and the diffracted light from the principle of acousto-optic diffraction in the Raman-Nath regime, which is verified experimentally. WebbAs shown in a series of papers by Raman and Nath (1935a,b, 1936a,b) the diffraction of light by sound waves can be most conveniently discussed in two limits delineated by the Raman-Nath parameter. In the Bragg regime, diffraction occurs for only one direction of the incident light whereas in the Raman-Nath limit, the scattering titan shop code
Light diffraction from a phase grating at oblique incidence in the ...
Webbused in the Bragg or Raman-Nath Regimes. The Raman-Nath Parameter Q is defined as k0 k w Q = a [1] where ka is the wave number of the acoustic wave, k0 is the wave number … Webb20 nov. 2024 · Abstract: In this work, a polarization grating in Raman-Nath regime was fabricated by using a photoreactive polymer liquid crystal exhibiting biaxial optical anisotropy. And from the measured characteristics, it has been demonstrated that the flat incident angle dependences on diffraction efficiency and polarization ellipticity are … Webb26 okt. 2024 · In this work, we experimentally demonstrate the diffraction of an atom laser in the Raman-Nath regime, a key step towards the development of an atom-laser-based … titan shoring post