Mazilu M, Baumgartl J, Kosmeier S, Dholakia K
SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, Fife, UK.
Opt Express. 2011 Jan 17;19(2):933-45. doi: 10.1364/OE.19.000933.
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.
我们报告了一种数学上严格的技术，该技术有助于优化自由空间中包括散射相互作用在内的电磁场的各种光学特性。该技术利用电磁场的线性以及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）。关键应用包括聚焦光斑尺寸的优化、通过亚波长孔径的传输以及作用在微粒上的光力的优化。我们通过使用贝塞尔光束的叠加来最小化聚焦光场的尺寸，从而通过实验验证了OEi方法。
