Surface Dynamics
Our research in Surface Dynamics is twofold. We have activities in the field of polar dielectrics and in the field of surface-guided and related acoustic waves. The latter are mainly Surface Acoustic Waves = SAW types, which look like these:
The work is done by the Surface Dynamics Group. It is characterized both by fundamental and applied research what includes an intensive co-operation with industrial enterprises.
We are active in the following fields of interest:
- Characterization of bulk materials (single crystals and ceramics, solid state surfaces and layered structures in relation to their
-
elastic (Brillouin Spectroscopy, Pulse-Echo Method, Laser-induced SAW Pulse Technique),
- dielectric,
- piezoelectric,
- ferroelectric and ferroelastic properties
- Experimental investigations of the excitation and propagation properties of Surface Acoustic Waves (SAW)
- Search for new acoustic modes guided by surfaces and interfaces and related phenomena
- Development of new design principles for SAW devices and their physical modelling in co-operation with industrial enterprises
- Acoustic sensors (e.g. Monitoring blood coagulation)
- Polar dielectrics: new promising piezoelectric crystals for SAW applications, ferroelectrics, incipient ferroelectrics and multiferroics
In order to gain insight into these areas, the following experimental and computational resources are used:
- Equipment for measuring SAW propagation velocity dispersion (SAW excitation by laser pulses, therefore also suitable for non-piezoelectric materials)
- Two Laser probes for measuring SAW fields and velocities and absolute SAW amplitudes, respectively
- Computer software for calculating acoustic modes in layered halfspaces and plates (generally piezoelectric, with any desired degree of anisotropy and in contact with liquids or gases)
- Physical models and computer software for analysis of SAW devices, in particular of resonator filters
- Devices for measuring the four-pole parameters of, for instance, SAW filters
- Low-temperature cryostat, suitable also for high-frequency measurements
Contact:
Dr. Hagen Schmidt
IFW Dresden e.V.
'Magnetic and acoustic resonances' (Dept. 15)
Surface Dynamics Group
P.O.Box 270116
D-01171 Dresden, Germany
phone: ++49/351/4659 278
fax: ++49/351/4659 440
e-mail: h.schmidt + @ifw-dresden.de (Sorry, but we try to prevent automatic SPAM)
