| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7130500 | Optics & Laser Technology | 2014 | 5 Pages |
Abstract
A radially polarized doughnut Gaussian beam is first introduced to generate a subwavelength focal spot. The focusing characteristics of a radially polarized doughnut Gaussian beam by a lens with high numerical aperture are investigated based on the Richards-Wolf diffraction integral formulae. Numerical results indicate that a sub-wavelength focusing can be obtained for a radially polarized doughnut Gaussian incident beam. Therefore, the radially polarized doughnut Gaussian beam is of great importance in the super-resolution focusing area.
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Authors
Jie Lin, Ran Chen, Haichao Yu, Peng Jin, Michael Cada, Yuan Ma,