title: Diffraction of light by two ultrasonic beams of frequency ratio 1:2, beyond the Raman-Nath diffraction regime
abstract: Light diffraction by two ultrasonic waves of frequency ratio 1:2 is examined beyond the Raman-Nath diffraction regime. Measurements were taken of +/- 1 order diffracted light intensities for some Raman-Nath parameter values, as a function of the phase shift between the sound beams. The experimental results obtained are discussed and compared with relevant theoretical predictions. Within the experimental conditions, a quite good quantitative agreement between the experimental data and the appropriate theoretical expectations is observed.
authors.affiliation: University of Gdansk, Institute of Experimental Physics, Poland.
authors.initials: G
authors.lastname: Gondek
authors.initials: T
authors.lastname: Katkowski
authors.initials: P
authors.lastname: Kwiek