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Focus shaping of tightly focused TEM11 mode cylindrically polarized Laguerre Gaussian beam by diffractive optical element |
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| Authors: | K Prabakaran KB Rajesh TVS Pillai Z Jaroszewicz |
| Institution: | 1. Department of Physics, Regional centre, Anna University, Tirunelveli Region,Tirunelveli, Tamil Nadu, India;2. Department of Physics, Chikkanna Government Arts College, Tirupur, Tamilnadu, India;3. Institute of Applied Optics, Department of Physical Optics, Warsaw, Poland and National Institute of Telecommunications, Warsaw, Poland |
| Abstract: | We study the focus shaping of tightly focused TEM11 mode cylindrically polarized Laguerre Gaussian beam with high numerical aperture lens axicon system is investigated theoretically by vector diffraction theory. The intensity pattern at the focus can be tailored by appropriately adjusting the rotation angle. We show that the high NA lens axicon system can generates a sub wavelength focal spot, focal hole, focal splitting and flat-topped focal shapes with extended depth of focus. |
| Keywords: | Lens axicon Vector diffraction theory Polarization Diffractive optical element |
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