Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/1937
Title: GENERATION OF SUB-WAVELENGTH LONGITUDINAL MAGNETIC PROBE AND MULTIPLE SPOTS USING CIRCULARLY POLARIZED ANNULAR MULTI-GAUSSIAN BEAM
Authors: S, Seethalakshmi
M, Udhayakumar
N, Priyadharsini
K B, Rajesh
Z, Jaroszewicz
Keywords: Inverse Faraday effect
High NA lens
Multi-belt complex phase filter
circularly polarized annular multi-Gaussian beam
Issue Date: 13-Nov-2019
Publisher: Springer Nature
Abstract: Based on vector diffraction theory and inverse Faraday effect, we numerically studied the magnetization induced by a tightly focused circularly polarized annular multi-Gaussian beam. Numerical result shows that the magnetization spot as small as 0.4 λ which extends up to 8 λ can be induced for incident circularly polarized annular multi-Gaussian beam (CPAMGB). We also noted that the depth of focus of the generated magnetization spot can be very well improved up to 48 λ through suitable phase modulation to the incident CPAMGB by means of specially designed complex phase filter. Moreover, we also noted that one can generate a chain of magnetization spots of different numbers and sizes upon suitably changing the beam order of CPAMGB and radii of complex phase filter. We expect that such a study will be fruitful for experimental realization of all-optical magnetic recording, multiple magnetic particle trapping and transportation, confocal and magnetic resonance microscopy, as well as multilayer ultra-high-density magnetic storage
URI: https://link.springer.com/article/10.1007/s12596-019-00571-9
http://localhost:8080/xmlui/handle/123456789/1937
ISSN: 0972-8821
Appears in Collections:International Journals



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