Study on polarization effect of azimuthally polarized LG beam in high NA Lens system |
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| Authors: | P Suresh C Mariyal TV Sivasubramonia Pillai KB Rajesh Z Jaroszewicz |
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| Institution: | 1. Department of ECE, National College of Engineering, Tirunelveli, Tamil Nadu 627151, India;2. Department of Physics, University College of Engineering, Anna University, Nagercoil, Tamil Nadu, India;3. Department of Physics, Chikkanna Government Arts College, Tirupur, Tamil Nadu, India;4. Institute of Applied Optics, Department of Physical Optics, Poland and National Institute of Telecommunications, Warsaw, Poland |
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| Abstract: | Based on vector diffraction theory, the intensity distributions of azimuthally polarized double-ring-shaped higher order beams near the focus are calculated numerically. It is shown that a subwavelength focal hole with a quite long depth of focus, multiple focal holes are achieved near the focus, when tuning β (is the ratio of the pupil radius to the beam waist) in the focal plane for different modes under tight focusing through high NA lens. Such kind of beams plays an important role in optical trapping, laser cutting and optical manipulation applications. |
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| Keywords: | Polarization High NA lens Azimuthally polarized beam |
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