2015
DOI: 10.1364/oe.23.024688
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Multifocal array with controllable polarization in each focal spot

Abstract: We propose a method for producing multifocal spot arrays (MSAs) capable of controlling the position and polarization orientation of each focal spot with radially polarized Bessel-Gaussian beam. Based on a simple analytical equation that can be used to manipulate the position of the focal spot, we design a type of multi-zone plate (MZP) composed of many fan-shaped subareas which accordingly generate lateral position-controllable multifocal spots. By adding a π-phase difference between a division line passing th… Show more

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Cited by 36 publications
(12 citation statements)
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“…Fewer annuli is recommended for subsequent fabrication. This is different from that in reference [19] where the aperture angel of each fan is similar and then the uniformity increases with the number N .…”
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confidence: 97%
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“…Fewer annuli is recommended for subsequent fabrication. This is different from that in reference [19] where the aperture angel of each fan is similar and then the uniformity increases with the number N .…”
contrasting
confidence: 97%
“…Ren et al [15] used a programmable spatial light modulator to encode the π -phase-step plates in the four quadrants of an azimuthally polarized beam and produced four focal spots withdifferent polarization directions. To producemore focal spots with controllable position and polarization, Zhu et al [19] designed a type of multi-zone plate for radially polarized Bessel-Gaussian beam according to the Fourier analytical form of Richards–Wolf integral. Comparedto the complex iterative algorithmsneeded in the spatial light modulator, it is easier to control focal position and polarization with the multi-zone plate.…”
mentioning
confidence: 99%
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“…1(b) . Here, M is the number of focus 23 .
Figure 1 Schematic diagram showing the construction of multiple focal spots from a vector beam based on PB phases.
…”
Section: Theory Principlementioning
confidence: 99%