Dal Negro Luca, Oton Claudio J, Gaburro Zeno, Pavesi Lorenzo, Johnson Patrick, Lagendijk Ad, Righini Roberto, Colocci Marcello, Wiersma Diederik S
INFM and Department of Physics, University of Trento, I-38050, Povo, Italy.
Phys Rev Lett. 2003 Feb 7;90(5):055501. doi: 10.1103/PhysRevLett.90.055501. Epub 2003 Feb 3.
The propagation of light in nonperiodic quasicrystals is studied by ultrashort pulse interferometry. Samples consist of multilayer dielectric structures of the Fibonacci type and are realized from porous silicon. We observe mode beating and strong pulse stretching in the light transport through these systems, and a strongly suppressed group velocity for frequencies close to a Fibonacci band gap. A theoretical description based on transfer matrix theory allows us to interpret the results in terms of Fibonacci band-edge resonances.
通过超短脉冲干涉测量法研究了光在非周期性准晶体中的传播。样品由斐波那契型多层介电结构组成，并由多孔硅制成。我们观察到在这些系统的光传输中存在模式拍频和强烈的脉冲展宽，并且在接近斐波那契带隙的频率处群速度被强烈抑制。基于传输矩阵理论的理论描述使我们能够根据斐波那契带边共振来解释这些结果。
