A 1-D dusty plasma photonic crystal

作者：Mitu M L^*; Toader D; Banu N; Scurtu A; Ticos C M

来源：Journal of Applied Physics, 2013, 114(11): 113305.

DOI：10.1063/1.4821843

It is demonstrated numerically that a 1-D plasma crystal made of micron size cylindrical dust particles can, in principle, work as a photonic crystal for terahertz waves. The dust rods are parallel to each other and arranged in a linear string forming a periodic structure of dielectric-plasma regions. The dispersion equation is found by solving the waves equation with the boundary conditions at the dust-plasma interface and taking into account the dielectric permittivity of the dust material and plasma. The wavelength of the electromagnetic waves is in the range of a few hundred microns, close to the interparticle separation distance. The band gaps of the 1-D plasma crystal are numerically found for different types of dust materials, separation distances between the dust rods and rod diameters. The distance between levitated dust rods forming a string in rf plasma is shown experimentally to vary over a relatively wide range, from 650 mu m to about 1350 mu m, depending on the rf power fed into the discharge.

• 出版日期2013-9-21