Optical Eigenmodes; exploiting the quadratic nature of the energy flux and of scattering interactions
Optical Eigenmodes; exploiting the quadratic nature of the energy flux and of scattering interactions
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DOI：
10.1364/oe.19.000933
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发表时间：
2011-01-17
期刊：
影响因子：
3.8
通讯作者：
Dholakia, K.
中科院分区：
文献类型：
--
作者：
Mazilu, M.;Baumgartl, J.;Dholakia, K.
我们报告了一个数学上严格的技术，有利于优化的各种光学性质的电磁场在自由空间中，包括散射相互作用。该技术利用电磁场的线性度沿着与强度的二次性质来定义与所考虑的相互作用相关的特定光学本征模（OEi）。主要应用包括聚焦点的大小的优化，通过亚波长孔径的传输，以及作用在微粒上的光学力。我们通过实验验证OEi方法，通过使用贝塞尔光束的叠加使聚焦光场的尺寸最小化。(C)2011年美国光学学会
We report a mathematically rigorous technique which facilitates the optimization of various optical properties of electromagnetic fields in free space and including scattering interactions. The technique exploits the linearity of electromagnetic fields along with the quadratic nature of the intensity to define specific Optical Eigenmodes (OEi) that are pertinent to the interaction considered. Key applications include the optimization of the size of a focused spot, the transmission through sub-wavelength apertures, and of the optical force acting on microparticles. We verify experimentally the OEi approach by minimising the size of a focused optical field using a superposition of Bessel beams. (C) 2011 Optical Society of America