Generation of Multiple Focal Hole Segments Using Double-Ring Shaped Azimuthally Polarized Beam
K. Lalithambigai
Department of Physics, Periyar University, Salem, Tamilnadu 636 011, India periyaruniversity.ac.in
Search for more papers by this authorR. C. Saraswathi
Department of Physics, Periyar University, Salem, Tamilnadu 636 011, India periyaruniversity.ac.in
Search for more papers by this authorP. M. Anbarasan
Department of Physics, Periyar University, Salem, Tamilnadu 636 011, India periyaruniversity.ac.in
Search for more papers by this authorCorresponding Author
K. B. Rajesh
Department of Physics, Chikkanna Government Arts College, Trippur, Tamilnadu 641 602, India
Search for more papers by this authorZ. Jaroszewicz
Department of Physical Optics, Institute of Applied Optics, 04894 Warsaw, Poland inos.pl
National Institute of Telecommunications, 04894 Warsaw, Poland itl.waw.pl
Search for more papers by this authorK. Lalithambigai
Department of Physics, Periyar University, Salem, Tamilnadu 636 011, India periyaruniversity.ac.in
Search for more papers by this authorR. C. Saraswathi
Department of Physics, Periyar University, Salem, Tamilnadu 636 011, India periyaruniversity.ac.in
Search for more papers by this authorP. M. Anbarasan
Department of Physics, Periyar University, Salem, Tamilnadu 636 011, India periyaruniversity.ac.in
Search for more papers by this authorCorresponding Author
K. B. Rajesh
Department of Physics, Chikkanna Government Arts College, Trippur, Tamilnadu 641 602, India
Search for more papers by this authorZ. Jaroszewicz
Department of Physical Optics, Institute of Applied Optics, 04894 Warsaw, Poland inos.pl
National Institute of Telecommunications, 04894 Warsaw, Poland itl.waw.pl
Search for more papers by this authorAbstract
We investigated the focusing properties of a double-ring-shaped azimuthally polarized beam tightly focused with a high NA lens and a binary phase filter. We observe that by using 3 belts and 5 belts binary phase filters novel focal patterns including splitting of focal rings and multiring focus are obtained. We also found that a suitably designed phase structure can shift the focal rings along optical axis. The author expects such investigation is worthwhile for optical manipulation and material processing technologies.
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