Thermal waves in absorbing media
نویسندگان
چکیده
منابع مشابه
Transport properties of waves in absorbing random media with microstructure.
Diffusion of waves in absorbing random media with microstructure is studied. A resonant correction to the transport mean free path lT is calculated. It is shown that in the certain range of wavelengths this correction leads to a growth of the lT compared to its nonresonant value. Significant changes in the transport velocity, the transport mean free path, and the diffusion constant caused by ab...
متن کاملSurface waves in defocusing thermal media.
We predict that the interface of materials with defocusing thermal nonlinearities supports stable fundamental and higher-order surface waves when the opposite edges of the medium are maintained at different temperatures. Such surface waves exist due to the interplay between repulsion from the interface and the defocusing thermal nonlinearity that deflects light beams from the bulk of the medium...
متن کاملAmplification of Light in Absorbing Media: Stimulated Thermal Rayleigh Scattering
Using well defined input pulses the amplification by stimulated thermal Rayleigh scattering was investigated experimentally as a function of time (within the pulse), of absorption coefficient, and of interaction length. The frequency difference between the two interacting light pulses was varied with an accuracy better than Av/v = 10~8. Amplification was measured in the backward direction and a...
متن کاملRing surface waves in thermal nonlinear media.
We address ring-shaped surface waves supported by defocusing thermal media with circular cross-section. Such waves exist because of the balance between repulsion from the interface and deflection of light from the bulk medium due to defocusing nonlocal nonlinearity. The properties of such surface waves are determined by the geometry of the sample. Nodeless ring surface waves are stable for all ...
متن کاملMultiple scattering of acoustic waves and porous absorbing media.
Porous media like air-saturated polymer foams with open cells, have a nontrivial frequency-dependent absorption that arises due to viscous and thermal effects at the scale of the rigid frame microstructure. In order to produce multiple scattering at ultrasonic frequencies, mesoscale scatterers are introduced in the porous medium host. The effective wave number of such a multiscale medium should...
متن کاملذخیره 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: Journal of Differential Equations
سال: 1988
ISSN: 0022-0396
DOI: 10.1016/0022-0396(88)90003-4