Steel M J, Marks Benjy, Rahmani Adel
MQPhotonics Research Centre, Dept of Physics and Engineering and Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), Macquarie University, NSW, Australia.
Opt Express. 2010 Jan 18;18(2):1487-500. doi: 10.1364/OE.18.001487.
Recent work has demonstrated sub-diffraction limited focusing using time-reversal mirrors and sources in scattering media at microwave frequencies. We numerically investigate the possibility of observing analogous effects in the optical domain using small cylindrical scatterers of realistic dielectric materials combined with an enclosing optical phase conjugate mirror in two-dimensional geometries. Such focusing is possible but appears not to significantly exceed the focusing available from an equivalent homogenized material, and is highly sensitive to precise scatterer configuration.
最近的研究工作已经证明，在微波频率下，利用时间反转镜和散射介质中的源可以实现亚衍射极限聚焦。我们通过数值研究了在二维几何结构中，使用实际介电材料的小圆柱形散射体与封闭的光学相位共轭镜相结合，在光学领域观察类似效应的可能性。这种聚焦是可行的，但似乎不会显著超过等效均匀材料所能实现的聚焦效果，并且对精确的散射体配置高度敏感。
