Here we present a structure based on a tunable spiralized Fresnel zone plate, engineered to turn dark zones into additional emission zones by properly rephasing the crossing light. The choice of a suitable configuration allows us to reduce the inherent linear anisotropy related to wire structures. The spiral design permits us to sweep the focus point along the three orthogonal coordinate directions and also provides some degree of frequency tunability, all desirable characteristics for modern applications of this type of lenses, such as modern micro-lensing devices.

Efficient light focusing through tunable spiralized Fresnel zone plate / Benedetti, A.; Alam, B.. - In: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. B, ONLINE. - ISSN 1520-8540. - 36:4(2019), pp. 1008-1016. [10.1364/JOSAB.36.001008]

Efficient light focusing through tunable spiralized Fresnel zone plate

B. ALAM
Secondo
Writing – Review & Editing
2019

Abstract

Here we present a structure based on a tunable spiralized Fresnel zone plate, engineered to turn dark zones into additional emission zones by properly rephasing the crossing light. The choice of a suitable configuration allows us to reduce the inherent linear anisotropy related to wire structures. The spiral design permits us to sweep the focus point along the three orthogonal coordinate directions and also provides some degree of frequency tunability, all desirable characteristics for modern applications of this type of lenses, such as modern micro-lensing devices.
Fresnel Zone Plates, Numerical Modeling, Spiral structures, Nanotechnology
01 Pubblicazione su rivista::01a Articolo in rivista
Efficient light focusing through tunable spiralized Fresnel zone plate / Benedetti, A.; Alam, B.. - In: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. B, ONLINE. - ISSN 1520-8540. - 36:4(2019), pp. 1008-1016. [10.1364/JOSAB.36.001008]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1251523
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