| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Tight Focusing Properties of Phase Modulated Radially Polarized Laguerre Bessel Gaussian Beam |
| K. Prabakaran1*, P. Sangeetha1, V. Karthik1, K. B. Rajesh2, A. M. Musthafa3 |
1Department of Physics, Mahendra Arts and Science College (Autonomous), Namakkal, Tamilnadu, India
2Department of Physics, Chikkanna Government Arts College, Tiruppur, Tamilnadu, India
3Department of General Studies (Physics Group), Jubail University College (Male Branch), Royal Commission of Jubail, Kingdom of Saudi Arabia
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| Cite this article: |
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K. Prabakaran, P. Sangeetha, V. Karthik et al 2017 Chin. Phys. Lett. 34 054203 |
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Abstract We propose a new approach for generating a multiple focal spot segment of subwavelength size, by tight focusing of a phase modulated radially polarized Laguerre Bessel Gaussian beam. The focusing properties are investigated theoretically by vector diffraction theory. We observe that the focal segment with multiple focal structures is separated with different axial distances and a super long dark channel can be generated by properly tuning the phase of the incident radially polarized Laguerre Bessel Gaussian beam. We presume that such multiple focal patterns and high intense beam may find applications in atom optics, optical manipulations and multiple optical trapping.
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Received: 15 January 2017
Published: 29 April 2017
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| PACS: |
42.25.Ja
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(Polarization)
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42.60.Jf
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(Beam characteristics: profile, intensity, and power; spatial pattern formation)
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42.30.Lr
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(Modulation and optical transfer functions)
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