TIGHT FOCUSING PROPERTIES OF PHASE MODULATED AZIMUTHALLY POLARIZED DOUGHNUT GAUSSIAN VORTEX BEAM BY HIGH NA PARABOLIC MIRROR

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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
Keywords:	Azimuthally polarized Doughnut Gaussian vortex beam Vector diffraction theory Multi belt complex phase filter High NA parabolic mirror
Issue Date:	10-Aug-2019
Publisher:	Materials Today Proceedings, Elsevier
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://www.sciencedirect.com/science/article/pii/S2214785319323478 http://localhost:8080/xmlui/handle/123456789/1825
ISSN:	2214-7853
Appears in Collections:	International Journals

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