Acoustic Bloch wave energy transport and group velocity

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Mass sensitivity of acoustic wave devices from group and phase velocity measurements

The effect of dispersion on acoustic wave sensors is considered. The discussion is focused upon layer guided surface acoustic waves ~Love waves!, which obtain their high mass sensitivity for the first Love wave mode by optimizing the guiding layer thickness, d, such that d;l l/4; the wavelength in the layer is given by l l5 f /v l where f is the operating frequency and v l is the shear acoustic...

متن کامل

Note on Group Velocity and Energy Propagation

A general proof is given for the equality between group velocity and energy velocity for linear wave propagation in a homogeneous medium with arbitrary spatial and temporal dispersion. In the series of physics “Questions” in the American Journal of Physics, K. M. Awati and T. Howes ask for a general proof of the fact that in linear dispersive wave propagation, energy propagates at the group vel...

متن کامل

General Theorems on the Equivalence of Group Velocity and Energy Transport

It is shown that under very general conditions there is a rigorous identity between the group velocity and the velocity of energy transport in nonhomogeneous media with or without anomalous dispersion. The medium is assumed nondissipative and the parameters such as density, rigidity, dielectric constant, etc., vary from point to point but are independent of the Cartesian coordinate lying in the...

متن کامل

Group velocity and energy transport velocity near the band edge of a disordered coupled cavity waveguide: an analytical approach

We develop an analytical approach to theoretically investigate light speed propagation near the band edge of a coupled cavity waveguide in the presence of residual disorder. This approach that is based on a mean field theory allows us to define the domains of validity of the group velocity and the energy transport velocity concepts as well as a guideline to minimize the role of the residual dis...

متن کامل

Diffraction correction for precision surface acoustic wave velocity measurements.

Surface wave dispersion measurements can be used to nondestructively characterize shot-peened, laser shock-peened, burnished, and otherwise surface-treated specimens. In recent years, there have been numerous efforts to separate the contribution of surface roughness from those of near-surface material variations, such as residual stress, texture, and increased dislocation density. As the accura...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: The Journal of the Acoustical Society of America

سال: 1991

ISSN: 0001-4966

DOI: 10.1121/1.2029724