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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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TIGHT FOCUSING PROPERTIES OF PHASE MODULATED AZIMUTHALLY POLARIZED DOUGHNUT GAUSSIAN VORTEX BEAM BY HIGH NA PARABOLIC MIRROR.docx | 545.46 kB | Microsoft Word XML | View/Open |
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