Wiersma Diederik S, Cavalieri Stefano
European Laboratory for Non-Linear Spectroscopy and Istituto Nazionale per la Fisica della Materia, Via Nello Carrara 1, 50019 Sesto Fiorentino (Florence), Italy.
Phys Rev E Stat Nonlin Soft Matter Phys. 2002 Nov;66(5 Pt 2):056612. doi: 10.1103/PhysRevE.66.056612. Epub 2002 Nov 26.
We study an amplifying disordered dielectric material of which the scattering strength can be controlled externally via temperature. Such a system was realized by infiltrating liquid crystal and laser dye inside sintered glass powders. The random laser materials that were obtained this way can be brought below or above threshold by small changes in environment temperature, and the bandwidth of its emission can be tuned. We will go into the experimental details and the technical aspects of the realization of these systems, and show measurements on the diffusion constant and spectral properties of the emission.
我们研究了一种放大无序介电材料，其散射强度可通过温度从外部进行控制。通过将液晶和激光染料渗入烧结玻璃粉末中来实现这样一个系统。以这种方式获得的随机激光材料可通过环境温度的微小变化被调至阈值以下或以上，并且其发射带宽可以被调节。我们将深入探讨这些系统实现的实验细节和技术方面，并展示关于扩散常数和发射光谱特性的测量结果。
