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Generation of multiple focal spot and focal hole of sub wavelength scale using phase modulated LG (1,1) beam |
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| Authors: | K Prabakaran KB Rajesh TVS Pillai R Chandrasekaran Z Jaroszewicz |
| Institution: | 1. Department of Physics, Regional Centre, Anna University, Tirunelveli Region Tirunelveli, Tamilnadu, India;2. Department of Physics, chikkanna Government Arts College, Tiruppur, Tamilnadu, India;3. Department of Physics, Government Arts College, Dharmapuri, Tamilnadu, India;4. Institute of Applied Optics, Department of Physical Optics, Warsaw, Poland;5. National Institute of Telecommunications, Warsaw, Poland |
| Abstract: | Based on the vector diffraction theory, the effect of phase modulation on the intensity distribution on tight focusing of cylindrically polarized Laguerre–Gaussian beam in the focal region of high NA lens is investigated theoretically. It is observed that a properly designed complex phase filter can generate multiple focal spot and focal hole segments useful for the manipulation of optical traps. |
| Keywords: | Focus shaping Polarization Complex filter Optical manipulation Multiple ring structure |
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