Abstract
We demonstrate that the spatial resolution in confocal laser scanning microscopy is remarkably improved by simple image subtraction between images acquired by higher-order transverse modes of a cylindrical vector beam, referred to as radially and azimuthally polarized Laguerre–Gaussian mode beams. Two types of combinations of vector mode beams suitable for subtraction imaging are derived by a systematical study based on numerical calculations. The spatial resolution of about 100 nm is experimentally achieved without the degradation of image quality.
| Original language | English |
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| Pages (from-to) | 883-886 |
| Number of pages | 4 |
| Journal | Optics Letters |
| Volume | 44 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2019 Feb 15 |