Huang J, Eradat N, Raikh M E, Vardeny Z V, Zakhidov A A, Baughman R H
Department of Physics, University of Utah, Salt Lake City, UT 84112, USA.
Phys Rev Lett. 2001 May 21;86(21):4815-8. doi: 10.1103/PhysRevLett.86.4815.
We studied coherent backscattering (CBS) of light from opal photonic crystals with incomplete band gaps. We observed a dramatic broadening of the CBS cone for incident angles close to the Bragg condition in the crystals. We modify the conventional CBS theory to incorporate Bragg attenuation resulting from the photonic band structure. By fitting the CBS data with the modified theory, we extract both the disorder-induced light mean-free path and the Bragg attenuation length of the inherent opal photonic crystal.
我们研究了具有不完全带隙的蛋白石光子晶体的光相干背散射（CBS）。我们观察到，对于接近晶体中布拉格条件的入射角，CBS锥显著展宽。我们修改了传统的CBS理论，以纳入由光子带结构引起的布拉格衰减。通过用修改后的理论拟合CBS数据，我们提取了无序诱导的光平均自由程和固有蛋白石光子晶体的布拉格衰减长度。
