TY - JOUR
T1 - Demonstration of flat-top focusing under radial polarization illumination
AU - Chen, Hao
AU - Tripathi, Santosh
AU - Toussaint, Kimani C.
PY - 2014/2/15
Y1 - 2014/2/15
N2 - We experimentally demonstrate the generation of a flat-top intensity distribution using a radially polarized vector beam. Our approach uses higher numerical aperture focusing than what has been previously reported for a single, fixed, vector beam. In addition, the flat-top focus generated in our scheme exhibits a polarization gradient along the radial coordinate in the focal volume, with an on-axis longitudinal field component that persists over 2λ, which is a stark difference from conventional flat-top fields, which exhibit intensity profiles that are uniformly polarized. Our experimental results are found to be in good agreement with the theoretical prediction.
AB - We experimentally demonstrate the generation of a flat-top intensity distribution using a radially polarized vector beam. Our approach uses higher numerical aperture focusing than what has been previously reported for a single, fixed, vector beam. In addition, the flat-top focus generated in our scheme exhibits a polarization gradient along the radial coordinate in the focal volume, with an on-axis longitudinal field component that persists over 2λ, which is a stark difference from conventional flat-top fields, which exhibit intensity profiles that are uniformly polarized. Our experimental results are found to be in good agreement with the theoretical prediction.
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U2 - 10.1364/OL.39.000834
DO - 10.1364/OL.39.000834
M3 - Article
C2 - 24562219
AN - SCOPUS:84897007446
SN - 0146-9592
VL - 39
SP - 834
EP - 837
JO - Optics Letters
JF - Optics Letters
IS - 4
ER -