Optical needles with arbitrary homogeneous three-dimensional polarization

Li, Hang; Wang, Ying; Chen, Peifeng

doi:10.1364/oe.386204

Cited by 9 publications

(5 citation statements)

References 30 publications

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“…Tight-focusing vector beams were an effective method to generate optical needles that own the above properties. By now, reversed dipole radiation arrays, paraxial spherical mirrors focusing, 4π focusing system, and wavefront modulation were the main methods for the generation of optical needles by tight focusing vector beams [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In addition, some special methods were used to generate ultra-long optical needle.…”

Section: Introductionmentioning

confidence: 99%

Generation of ultra-long optical needles with dual-ring cosine filter

Zhang,

Wu,

Lan

et al. 2023

Phys. Scr.

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Combining the advantages of phase and amplitude modulation, we designed a dual-ring cosine filter which was consisted by an inner and outer ring, and the two rings have different number of paired cosine phase. Using the dual-ring cosine filter, ultra-long longitudinally polarized optical needles were obtained by tight focusing radially polarized Bessel-Gaussian beams with single lens system. And the obtained optical needles have depth of focus of 268λ, lateral full width of 0.37λ at half height, beams quality of 94% and axial uniformity of 95%. In addition, we found that the depth of focus of obtained optical needles can be further stretched and the lateral dimension can be further compressed by increasing the number of paired cosine phase. The ultra-long optical needles were appropriately applied in the fields of optical beams lithography, laser direct writing, particle acceleration and optical trapping.

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Section: Introductionmentioning

confidence: 99%

Generation of ultra-long optical needles with dual-ring cosine filter

Zhang,

Wu,

Lan

et al. 2023

Phys. Scr.

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“…The ptical needle, also called a light pin, with a homogeneous axial intensity distribution and small full width at halfmaximum (FWHM) of cross-section, has become a hot topic of scientific research in recent years, because of its important applications, such as optical manipulation [1,2], particle acceleration [3][4][5], optical trapping [6][7][8][9], high-density optical datastorage [10][11][12], fluorescent imaging [13][14][15] and so on. Many scholars have reported the production of uniformintensity optical needles [16][17][18][19][20][21][22][23]. In 2008, Wang et al [19] reported for the first time that a purely longitudinally polarized optical needle with sub-diffraction beam size (0.43λ) and long depth of focus (∼4λ) was generated by focusing a * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Generating a 3D optical needle array with prescribed characteristics

Zeng¹,

Yu²,

Chen³

et al. 2022

J. Opt.

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Unlike the general optical needle along the optical axis, we propose a method to generate a three-dimensional (3D) array formed by optical needles with prescribed length and polarization direction. Moreover, the geometric model of the created array can be specified. With the aid of antenna array pattern synthesis theory and time reversal technology, a virtual uniform line source (ULS) antenna array arranged regularly near the confocal region of two high numerical apertures objectives is employed to obtain the required illumination in the pupil plane for creating the desired focal fields. Numerical results demonstrate that there is a one-to-one correspondence between the focal field and the virtual ULS antenna array elements. The length and polarization direction of the optical needles depends on the length and spatial direction of the virtual ULS antenna. The peculiarities of the focal field array, such as the polarization, length, number, spatial position and array structure, can be customized according to application requirements. The created optical needle array can be used for such application as 3D synchronous particle acceleration and manipulation, 3D parallel fabrication.

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“…The study of the field in the focal region of an optical system with high numerical aperture has received much attention in the last two decades, because of its potential applications in microlithography, image processing, diffractive optics, adaptive optics, or holographic data storage [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Furthermore, the analysis of the on-axis intensity of highly focused optical fields has also proven to be of much practical interest, because it allows us to design structures such that their behavior along the axis can be modulated [7,9,11,[14][15][16]20].…”

Section: Introductionmentioning

confidence: 99%