Interdigital transducer method of acoustic beam steering for bulk wave acousto-optic Bragg cells

Palmieri, L.; Socino, G.; Verona, E.
September 1985
Applied Physics Letters;9/1/1985, Vol. 47 Issue 5, p463
Academic Journal
A LiNbO3 acousto-optic Bragg cell is described, which uses an interdigital transducer deposited on the x surface of the crystal so as to excite longitudinal bulk acoustic waves along a direction almost normal to the surface itself. By a proper choice of the periodicity of the transducer electrodes, a frequency-dependent steering of the acoustic beam can be obtained, which allows the Bragg conditions to be satisfied over a wide range of frequencies. Results are reported relative to a cell operating in the frequency range 1.4–2.1 GHz, with a diffraction efficiency of approximately 2% per watt of acoustic power.


Related Articles

  • A novel phased array acousto-optic Bragg cell. Chen, T. S.; Yao, S. K. // Journal of Applied Physics;11/15/1986, Vol. 60 Issue 10, p3732 

    Examines the elimination of one of two steering acoustic wave fronts when asymmetrically introduced to an otherwise planar phased array Bragg cell transducer design. Use of an etched-silver periodic substrate; Improvement in accousto-optic diffraction efficiency with the quasiplanar phased...

  • Efficient unidirectional nanoslit couplers for surface plasmons. López-Tejeira, F.; Rodrigo, Sergio G.; Martín-Moreno, L.; García-Vidal, F. J.; Devaux, E.; Ebbesen, T. W.; Krenn, J. R.; Radko, I. P.; Bozhevolnyi, S. I.; González, M. U.; Weeber, J. C.; Dereux, A. // Nature Physics;May2007, Vol. 3 Issue 5, p324 

    The emerging field of plasmonics is based on exploiting the coupling between light and collective electronic excitations within conducting materials known as surface plasmons. Because the so-called surface plasmon polariton (SPP) modes that arise from this coupling are not constrained by the...

  • A waveguide slit array antenna fabricated with subwavelength periodic grooves. Huang, Cheng; Du, Chunlei; Luo, Xiangang // Applied Physics Letters;10/1/2007, Vol. 91 Issue 14, p143512 

    This paper presents a waveguide slit array antenna with high gain and narrow beamwidth. This antenna is formed by subwavelength slits surrounded with periodic grooves. The far field radiation characteristics of the improved antenna are investigated. Simulation results show that the gain of the...

  • Acoustooptic Cells with Nonuniform Length of Light–Sound Interaction. Voloshinov, V.B.; Knyazev, G.A. // Technical Physics;Nov2003, Vol. 48 Issue 11, p1475 

    Diffraction of light by acoustic waves that are generated in the acoustooptic cells of piezoelectric transducers with complex geometry is studied. The diffraction by acoustic beams with triangular, quadrangular (rhombic), hexagonal, etc., cross sections, when the lengths of light–sound...

  • Acoustic resonator based on periodically poled transducers: Concept and analysis. Bassignot, F.; Courjon, E.; Ulliac, G.; Ballandras, S.; Lesage, J.-M.; Petit, R. // Journal of Applied Physics;Mar2012, Vol. 111 Issue 6, p064106 

    The demand for highly coupled high quality acoustic wave devices for radio-frequency (RF) signal processing based on passive devices has generated a strong innovative activity, yielding the investigation of new excitation principles and waveguide structures. Periodically poled transducers (PPTs)...

  • Transient Fields Generated by Spherical Shells in Viscous Media. Kelly, James F.; McGough, Robert J. // AIP Conference Proceedings;4/14/2009, Vol. 1113 Issue 1, p210 

    The lossless impulse response method models transient wave propagation generated by finite apertures, including focused radiators, while neglecting frequency-dependent attenuation. Therefore, an analytical time-domain expression that incorporates loss, diffraction, and focusing is needed for...

  • Absorption saturation and self-action processes under resonant excitation of the basic exciton transition in CdSe/ZnS colloidal quantum dots. Dneprovskiĭ, V. S.; Zhukov, E. A.; Kozlova, M.V.; Wumaier, T.; Hieu, Dau Sy; Artem'ev, M. V. // Physics of the Solid State;Sep2010, Vol. 52 Issue 9, p1941 

    The revealed absorption saturation and Fresnel diffraction of ultrashort laser pulses under resonant excitation of the basic exciton transition in CdSe/ZnS quantum dots (a strongly absorbing colloidal solution) have been explained by the processes of filling of states of a two-level system with...

  • Structural dynamics of surfaces by ultrafast electron crystallography: Experimental and multiple scattering theory. Schäfer, Sascha; Liang, Wenxi; Zewail, Ahmed H. // Journal of Chemical Physics;12/7/2011, Vol. 135 Issue 21, p214201 

    Recent studies in ultrafast electron crystallography (UEC) using a reflection diffraction geometry have enabled the investigation of a wide range of phenomena on the femtosecond and picosecond time scales. In all these studies, the analysis of the diffraction patterns and their temporal change...

  • Magic numbers, excitation levels, and other properties of small neutral 4He clusters (N≤50). Guardiola, Rafael; Kornilov, Oleg; Navarro, Jesús; Toennies, J. Peter // Journal of Chemical Physics;2/28/2006, Vol. 124 Issue 8, p084307 

    The ground-state energies and the radial and pair distribution functions of neutral 4He clusters are systematically calculated by the diffusion Monte Carlo method in steps of one 4He atom from 3 to 50 atoms. In addition the chemical potential and the low-lying excitation levels of each cluster...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics