Open Access

Generation of Sub Wavelength Focal Hole Segment using Azimuthally Polarized Higher Order Beam by High NA Parabolic Mirror

V. Senthilkumar, Department of Physics, Chikkanna Government Arts College, Tirupur, Tamilnadu,India N.Umamageswari, Department of Physics, Research and Development Centre, Bharathiar University, Coimbatore,TN, India M.Udhayakumar , Department of Physics, Chikkanna Government Arts College, Tirupur, Tamilnadu,India K.B. Rajesh rajeskb@gmail.com
Department of Physics, Chikkanna Government Arts College, Tirupur, Tamilnadu,India


J. Environ. Nanotechnol., Volume 5, No 1 (2016) pp. 13-16

https://doi.org/10.13074/jent.2016.03.161184

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Abstract

The focusing properties of a tight focusing of higher order azimuthally polarized beam through a high numerical aperture parabolic mirror are numerically investigatedbased on vector diffraction theory. It shows that the three-dimensional intensity distributions in the vicinity of the focus is dependent on the polarization rotation angle, pupil to beam radio and numerical aperture value.Additionally, somegenerated focal segment is a splitted holes and focal hole increase in the axial direction. Such a focal hole segment is highly useful for trapping particles, laser cutting, microscopy and the manipulation of optical traps of low refractive index particles.

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