Advanced PSF Calculation in a High-NA Lens System

It is known that the vectorial nature of light starts to play a non-negligible role in high-NA focusing situations. In this example, focusing of a linearly polarized Gaussian beam by a high-NA aspheric lens is presented, and it is shown that the PSF in the focal plane shows asymmetry. By examining the electromagnetic field components in the focal plane, it can be found that the asymmetry is caused by a relatively strong E(z) component.

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