论文部分内容阅读
We propose an approach to control the polarization and intensity of the focusing field with multiple focal points in a high numerical-aperture (NA) imaging system.This focused field is explained as the reversal radiation of the dipole array with presupposed direction of oscillation near the focus of the high-NA lens.Through engineering the structure of the electric dipole array and reversing the radiation from this dipole array,the local manipulation of intensity and polarization in the focal region is achieved and the required field at pupil plane is derived.A focusing field with six vectorial focal spots is constructed as an example to verify this method.This multifocal field will meet potential application in polarization-dependent optical microscope and optical trapping for multiple particles.