Crassous Jérôme, Erpelding Marion, Amon Axelle
Institut de Physique de Rennes UMR CNRS 6251, Université de Rennes 1, Campus de Beaulieu, F-35042 Rennes Cedex, France.
Phys Rev Lett. 2009 Jul 3;103(1):013903. doi: 10.1103/PhysRevLett.103.013903. Epub 2009 Jul 2.
We consider the propagation of a diffusive wave in a scattering medium submitted to a homogeneous expansion. The light multiply scattered by a glass spheres sample is measured. We analyze the variations of the scattered light when the material and the optical wavelength are dilated. We experimentally show that an isotropic expansion of the material is equivalent to a contraction of the wavelength. Moreover, the effect of an expansion of the material on the scattered wave may be canceled by a proportional increase of the wavelength, keeping the phase of the scattered wave unchanged. Applications to the characterization of deformation of disordered materials are outlined.
我们考虑在经历均匀膨胀的散射介质中扩散波的传播。测量了由玻璃球样品多次散射的光。我们分析了材料和光波长膨胀时散射光的变化。我们通过实验表明，材料的各向同性膨胀等效于波长的收缩。此外，材料膨胀对散射波的影响可以通过波长成比例增加来抵消，从而使散射波的相位保持不变。概述了其在无序材料变形表征中的应用。
