%0 Journal Article %T Generation of multiple focal hole segment by tight focusing of azimuthally polarized double ring shaped beam %A N. Veerabagu Suresh %A R.C. Sarasvathi %A Haresh M. Pandya %A K.B. Rajesh %D 2013 %R 10.13074/jent.2013.02.nciset36 %J Journal of Environmental Nanotechnology %P 37-41 %V 2 %N (Special Issue) %I Institute for Environmental Nanotechnology %U https://doi.org/10.13074/jent.2013.02.nciset36