Tight focusing properties of phase modulated transversely polarized sinh Gaussian beam

Sundaram, C. Mohana; Prabakaran, K.; Anbarasan, P. M.; Rajesh, K. B.; Musthafa, A. Mohamed; Aroulmoji, V.

doi:10.1007/s11082-016-0857-7

Cited by 13 publications

(6 citation statements)

References 29 publications

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“…And the obtained optical needle owned 0.48λ of FWHM and 36λ of DOF. The sidelobe intensity of the obtained optical needle was about 35% [35]. Therefore, the highperformance optical needles can be obtained with complex filters [37][38][39].…”

Section: Introductionmentioning

confidence: 91%

“…The l 0 (θ) is amplitude distribution function of the incident radially polarized sinh-Gaussian beam. The l 0 (θ) is expressed as equation (3) [35,43].…”

Section: Theorymentioning

confidence: 99%

“…Complex phase filter could be regarded as an extension of the ternary phase-amplitude filter. This filter has recently been reported which can generate pure ultra-long optical needles by modulating the phase of polarized beam [14,15,20,[34][35][36]. Using the complex phase filter, Prabakaran et al obtained optical needle with 5.7λ of DOF and 1.4λ of FWHM by tightly focusing radially polarized BG beam in 2014 [34].…”

Section: Introductionmentioning

confidence: 99%

“…In this work, a multi-belts complex phase filter (MBCPF) was optimized based on above reports [34][35][36]. A longitudinally polarized optical needle was obtained with the optimized MBCPF by tightly focusing radial polarized sinh-Gaussian beam in a single lens system.…”

Section: Introductionmentioning

confidence: 99%

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The generation of ultra-long longitudinally polarized optical needle with multi-belt complex phase filter

Liu,

Zhang,

et al. 2024

Phys. Scr.

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In the paper, a multi-belt complex phase filter was optimized by increasing the number of belts and changing phase and amplitude parameters of the filter. By focusing radially polarized sinh-Gaussian beams in single objective system with high-NA lens, longitudinal polarized optical needles were obtained with super-resolution in focal plane. And the super-resolution optical needle owned 36.6λ depth of focus and 0.42λ of full–width at half-maximum. The aspect ratio of the obtained optical needle was 87.14. The beam quality reached to 87.7%. The results demonstrated that the optimized multi-belt complex phase filter can lengthen depth of focus and compress transverse size simulta-neously. The obtained longitudinally polarization optical needles can be used in the fields of optical data storage, super-resolution imaging, particle trapping, nanolithogra-phy and so on.

show abstract

Section: Introductionmentioning

confidence: 91%

“…The l 0 (θ) is amplitude distribution function of the incident radially polarized sinh-Gaussian beam. The l 0 (θ) is expressed as equation (3) [35,43].…”

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The generation of ultra-long longitudinally polarized optical needle with multi-belt complex phase filter

Liu,

Zhang,

et al. 2024

Phys. Scr.

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show abstract

“…This method greatly improved the stiffness of the radial trap and expended the distance of the axial trap. Sundaram et al used an azimuthally polarized CHsG beam to obtain an optical needle [33]. A sevenbelt complex filter and a spiral phase hologram filter are designed to jointly control the phase and amplitude of the incident beam.…”

Section: Introductionmentioning

confidence: 99%

Super-Diffraction Longitudinally Polarized Optical Needle With Ultra-Long Focal Depth Generated by a Radially Polarized High-Dimensional Circular Hollow Sinh-Gaussian Beam

Wang

Yan

et al. 2022

IEEE Photonics J.

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In this paper, the incident beam called highdimensional circular hollow sinh-Gaussian (HD-CHsG) beam with a novel wavefront is proposed, which is determined by three parameters (m, σ0, σ1). Based on the Richards-wolf vector diffraction theory, it can be focused into a longitudinal polarized optical needle through a high numerical aperture lens. The effects of the three parameters (m, σ0, σ1) on the resolution and depth of focus of the longitudinally polarized optical needle are simulated and analyzed. In the condition of (m, σ0, σ1) = (8, 0.6, 0.125), a super-diffraction longitudinal optical needle with ultra-long focal depth (resolution 0.40λ, focal depth 18.36λ, depth-to-width ratio 45.9:1) is generated. In addition, compared with a radially polarized incident beam whose amplitude distribution is Gaussian and circular hollow sinh-Gaussian (CHsG) distribution, the resolution and depth of focus of the longitudinally polarized optical needle obtained by focusing the HD-CHsG beam are higher. Both simulations and experiments are carried out to demonstrate the availability of our method. Our findings are of great significance to the production, manipulation, and application of longitudinally polarized optical needle.

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New hyperbolic structures for the conformable time-fractional variant bussinesq equations

Ali

Nuruddeen²,

Raslan

2018

Opt Quant Electron

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Tight focusing properties of phase modulated transversely polarized sinh Gaussian beam

Cited by 13 publications

References 29 publications

The generation of ultra-long longitudinally polarized optical needle with multi-belt complex phase filter

The generation of ultra-long longitudinally polarized optical needle with multi-belt complex phase filter

Super-Diffraction Longitudinally Polarized Optical Needle With Ultra-Long Focal Depth Generated by a Radially Polarized High-Dimensional Circular Hollow Sinh-Gaussian Beam

New hyperbolic structures for the conformable time-fractional variant bussinesq equations

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