Welcome to JENT its Thursday 18th of January 2018

Journal of Environmental Nanotechnology

(A Quarterly Peer-reviewed and Refereed International Journal)
ISSN(Print):2279-07 48; ISSN(Online):2319-5541
CODEN:JENOE2

Effect of Pupil Beam in the Focal Region of High Numerical Aperture Objective Lens

Abstract

In this article, based on vector diffraction theory the focusing properties of double ring shaped higher order Laguerre – Gauss beam with radial varying polarization are investigated numerically. The numerical simulations show that the evolution of some interesting focal spot, focal split and focal patterns in the focal region by changing polarization rotation angle under tight focusing through the high NA lens. It is also 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 the high NA lens. We found that when tuning, beam parameter or the polarization rotation angle of the incident beam, it is possible to generate some interesting novel focal patterns, including multiple intensity rings, dark hollow focus and cylindrical crust focus. Such kind of beams plays an important role in optical trapping, laser cutting and optical manipulation applications.

Article Type: Research Article

Corresponding Author: P. Suresh 2  

Email: suresh3982@yahoo.co.in

This article has not yet been cited.

C. Amala Prathiba Janet 1,  P. Suresh 2*,  T. V. S. Pillai 3.  

1. Department of Physics, St.Xavier’s Catholic College of Engineering, Nagercoil, TN, India.

2. Department of ECE, National College of Engineering, Tirunelveli, TN, India.

3. Department of Physics, University College of Engineering, Nagercoil, TN, India

J. Environ. Nanotechnol. Volume 4, No.1 pp. 76-79
ISSN: 2279-0748 eISSN: 2319-5541
ENT 144117.pdf
Download Citation

Reference

Ashkin, A., Dziedzic, J. M., Bjorkholm, J. E. and Chu, S., Observation of a single-beam gradient force optical trap for dielectric particles, Opt. Lett., 11(5), 288–290 (1986).
doi:10.1364/OL.11.000288
Rittweger, E., Kyuyounghan, Irvines, E., Eggling, C. and Hells, W., STED microscopy reveals crystal colour centres with nanometric resolution, Nature Photonics, 3 (3), 144–147 (2009).
doi:10.1038/nphoton.2009.2
Visscher, K. and Brakenhoff, G. J., Theoretical study of optically induced forces on spherical particles in a single beam trap I: Rayleigh scatterers, Optik 89, 174–180 (1992).
Zhan, Q. and Leger, J. R., Focus shaping using cylindrical vector beams, Opt. Express, 10(7), 324–331 (2002).
doi:10.1364/OE.10.000324
Kuga, T., Torii, Y., Shiokawa, N., Hirano, T., Shimizu, Y. and Sasada, H., Novel optical trap of atoms with a doughnut beam, Phys. Rev. Lett., 78(25), 4713–4716 (1997).
doi:10.1103/PhysRevLett.78.4713
Suresh, P., Mariyal, C., Sivasubramonia Pillai, T. V., Rajesh, K. B. and Jaroszewicz, Z., Study on polarization effect of azimuthally polarized LG beam in high NA Lens system, Optik, 124(21), 5099– 5102 (2013).
doi:10.1016/j.ijleo.2013.03.139
Levenson, M. D., Ebihara, T., Dai, G., Morikawa, Y., Haayashi, N. and Tan, S. M., Optical vortex masks for via levels, Microlithogr. Micofabr. Microsyst., 3(2), 293-304 (2004).
Kozawa, Y. and Sato, S., Focusing property of a double-ring-shaped radially polarized beam, Opt. Lett., 31(6), 820–822 (2006).
doi:10.1364/OL.31.000820
Kozawa, Y. and Sato, S., Sharper focal spot formed by higher-order radially polarized laser beams, J. Opt. Soc. Am. A., 24(6), 1793 – 1798 (2007).
doi:10.1364/JOSAA.24.001793
Moser, T., Glur, H., Romano, V., Pigeon, F., Parriaux, O. and Ahmed, M. A., Polarization- selective grating mirrors used in the generation of radial polarization, Appl. Phys. B., 80(6), 707–13 (2005).
doi:10.1007/s00340-005-1794-5
Gao, X., Fu, R., Shen, H., Dong, X., Geng, T. and Zhuang, S., Focus shaping of Bessel–Gauss beam with radial varying polarization, Optica. Applicata., 42(3), 481– 491 (2012).
Gao, X., Hu, S., Li, J. S., Ding, Z. H., Guo, H. M. and Zhuang, S. L., Tunable optical gradient trap by radial varying polarization Bessel–Gauss beam, J. Biomedical Science and Engineering 3(5), 304–307 (2010).
doi:10.4236/jbise.2010.33041

>>