Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4794030
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Funding
- Australian Research Council (ARC) Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS) [CE110001018]
- Laureate Fellowship scheme [FL100100099]
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Diffraction-limited non-Airy multifocal arrays are created by focusing a phase-modulated vortex beam through a high numerical-aperture objective. The modulated phase at the back aperture of the objective resulting from the superposition of two concentric phase-modulated vortex beams allows for the generation of a multifocal array of cylindrically polarized non-Airy patterns. Furthermore, we shift the spatial positions of the phase vortices to manipulate the intensity distribution at each focal spot, leading to the creation of a multifocal array of split-ring patterns. Our method is experimentally validated by generating the predicted phase modulation through a spatial light modulator. Consequently, the spatially shifted circularly polarized vortex beam adopted in a dynamic laser direct writing system facilitates the fabrication of a split-ring microstructure array in a polymer material by a single exposure of a femtosecond laser beam. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4794030]
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