Robb G R M, McNeil B W J
Department of Physics, John Anderson Building, University of Strathclyde, Glasgow G4 0NG, Scotland.
Phys Rev Lett. 2003 Mar 28;90(12):123903. doi: 10.1103/PhysRevLett.90.123903.
We demonstrate that superfluorescent scattering of light can occur when laser light is incident on a collection of dielectric Rayleigh particles suspended in a viscous medium. Using a linear stability analysis, an expression for the spatiotemporal evolution of the scattered (probe) field is derived. An approximate condition for the progression of the interaction into the nonlinear regime is deduced and it is shown that, in the nonlinear regime, the scattered field intensity shows the characteristic quadratic dependence on particle density expected from a superfluorescent or superradiant process, once the effects of pump depletion are accounted for.
我们证明,当激光入射到悬浮在粘性介质中的介电瑞利粒子集合上时,会发生超荧光光散射。通过线性稳定性分析,推导了散射(探测)场的时空演化表达式。推导了相互作用进入非线性区域的近似条件,结果表明,在非线性区域中,一旦考虑了泵浦耗尽的影响,散射场强度表现出超荧光或超辐射过程所预期的对粒子密度的特征二次依赖性。