Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/5274
Title: TIGHT FOCUSING PROPERTIES OF PHASE MODULATED AZIMUTHALLY POLARIZED DOUGHNUT GAUSSIAN VORTEX BEAM BY HIGH NA PARABOLIC MIRROR
Authors: Umamageswari, N
Lavanya, M
Udhayakumar, M
Rajesh, K. B.
Zaroszewicz, Z
Issue Date: 2020
Publisher: Elsevier B.V
Abstract: The intensity distribution in the focal region of a high NA parabolic mirror for the incident azimuthally polarized doughnut Gaussian vortex beam (DGVB) transmitted through a multi belt complex phase filter (MBCF) is studied using vector diffraction theory. By properly designing the phase of the incident beam using MBCF and by tuning the beam parameters of a DGVB, it is possible to switch the focal spot with sub wavelength dimension and long focal depth in to multiple focal spots suitable for particle acceleration, atom optical experiments, and near-field scanning optical microscopy.
URI: https://doi.org/10.1016/j.matpr.2019.07.209
Appears in Collections:Conference Paper



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