The maximum of diffraction efficiency is reached for considerable shorter time in grating recording kinetics in the region of deep saturation. This opens the perspective of using those materials for novelty filter. The experimental results on low-saturated dry bacteriorhodopsin films well agree the ...
The holes are very closely spaced and form a transmissive optical grating, having dimensions suitable for operating in the Raman-Nath regime. Mirrors or lenses are formed within the device for guiding an input beam into the waveguide as a parallel light source. 展开 ...
Keywords:acoustic-opticeffect;Raman-Nathdiffraction;ultrasoniegrating;lightintensityofdiffraction 0 引言 声波是一种弹性应变波,当光束通过声场扰动 下的介质时,将产生光的衍射,即为声光效应。在声 光效应中,当光垂直于声波传播方向照射介质时,产 生的衍射称为拉曼一内斯(Raman—Nath)衍射;光经 ...
optical scattering from a parallel ultrasonic setup is presented in which an optical beam is scattered by a surface acoustic wave that acts as a Raman-Nath-type dynamic grating and the scattering is controlled and monitored by a bulk (Bragg) acousto-optic grating placed adjacent to the surface ...
The holes are very closely spaced and form a transmissive optical grating, having dimensions suitable for operating in the Raman-Nath regime. Mirrors or lenses are formed within the device for guiding an input beam into the waveguide as a parallel light source....
In this work we demonstrate the integration of a spectrometer directly into smartphone screen by femtosecond laser inscription of a weak Raman–Nath volume grating either into the Corning Gorilla glass screen layer or in the tempered aluminosilicate glass protector screen placed in front of the phone...
In this Letter, we discuss Raman–Nath acousto-optic diffraction, and a new model of Raman–Nath acousto-optic diffraction is presented. The model is based on the individual and simultaneous occurrences of phase-grating diffraction and the Doppler effect and optical phase modulation and photon–...
light pulse atom interferometerlarge momentum beam splitterNear-resonant Kapitza–Dirac diffraction theory is extended out of familiar Raman–Nath approximation. New solutions with initial superposition of equidistant momentum states, applied to one- and two-optical grating atom interferometer schemes, ...
Repeating these experiments for different periods and for coverplated and uncoverplated layers, we offer a more complete analysis of the processes taking place indicating that not only is a volume holographic grating formed but also a surface relief profile. Evolution of both the holographic and the...
Results for Raman-Nath diffraction from the g 44 grating are presented. The influence of the polarization of the incident beam has been discussed. The Raman-Nath diffraction could be controlled by the direction and intensity of the applied field....