Sculpting optical fields into caustic patterns based on freeform optics

Optica, Journal Year: 2023, Volume and Issue: 10(12), P. 1688 - 1688

Published: Nov. 6, 2023

Manipulating flux transportation of optical fields holds great promise across various kinds applications, encompassing laser micro-processing, trapping, microscopic imaging, and illumination engineering. In recent decades, freeform optics, lauded for its capacity to efficiently control the wavefronts beams with high design freedom, has garnered significant attention as a potent tool shaping light. Nevertheless, predominant focus in current research centered on development elements (FOEs) tailored project designated two-dimensional density onto specific target plane. This limitation confines potential applications light optics rather restricted domain. Moreover, constraints imposed by geometric pose further FOEs, particularly their ability sculpt coherent light, such beams, these are susceptible diffraction effects. Within context this study, we propose paradigm that harnesses craft trajectories three dimensions. approach inherently gives rise caustics, which singularities within realm transfer optics. Crucially, our proposed method yields capability generate sharply defined patterns, empirically giving better results mitigating effects contrast previous methodologies, is observed experiments. philosophy empowers FOEs undertake new roles functionalities caustics. To substantiate proposal, present diverse array examples. These encompass scenarios ranging from parallel planes sculpting propagation into three-dimensional curves, well reshaping beam intensities an extended depth field. We expect work can broaden scope non-imaging propel hitherto unexplored territories.

Language: Английский

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On-demand generation of nondiffracting Helmholtz–Gauss laser beams

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 29, 2025

Language: Английский

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Manipulating self-focusing beams induced by high-dimensional parabolic umbilic beams

Results in Physics, Journal Year: 2023, Volume and Issue: 52, P. 106806 - 106806

Published: Aug. 1, 2023

The excellent property that the intensity of autofocusing beams in focal plane increases exponentially, makes them especially beneficial for biomedical treatment. We experimentally generate tunable (2+1)-dimensional circular parabolic umbilic (CPUBs) first time based on high-dimensional diffraction catastrophe integral, which is determined by potential function. Such CPUBs have and symmetrical distributions space through radial symmetry transformation. Due to flexibility high dimensionality, these light rich field structures self-focusing property. Where, maximum suddenly orders magnitude plane. Unlike classical Airy beams, exhibit multiple points along optical axis a needle-like structure during propagation, can be affected manipulating control parameters. properties provide new perspective exploring novel physical mechanisms phenomena beams. experimental results verify correctness numerical simulations. greatly enrich beam family will advantageous medical treatments, micromanipulation, microscopic imaging.

Language: Английский

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Generation of a modulated versatile spiral beam with varying intensity distribution along the propagation

Optics Express, Journal Year: 2023, Volume and Issue: 31(24), P. 40620 - 40620

Published: Oct. 31, 2023

A new type of versatile spiral beam (VSB) is generated based on the competition mechanism between self-focusing property ring Airy and metalens phase distribution, which exhibits twisted properties optical bottle structure along propagation direction. The number lobes, rotation direction, shape magnification times cross section proposed can be customized by flexibly tuning diffraction distance, topological charge constant parameter. Therefore, VSB viewed as tunable three-dimensional (3D) beam, our scheme has superiority with more diverse intensity distribution. distribution variation depended distance are demonstrated convincingly employing Poynting vector intuitive presentation energy flow. VSBs aid above-mentioned beneficial for guiding microparticles designed path capturing multiple into closed dark regions. Finally, modulated beams implemented tool particle manipulation in three dimensional space to demonstrate advantages we observe stable trapping particles.

Language: Английский

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Optical vector fields with kaleidoscopic quasicrystal structures by multiple beam interference

Optics Express, Journal Year: 2023, Volume and Issue: 31(20), P. 33077 - 33077

Published: Sept. 12, 2023

An easily accessible approach is proposed to create structured beams with various quasicrystal structures and polarization distributions based on multi-beam interference. By controlling the azimuthally-dependent for Q evenly circularly distributed be interfered, intensity generated field Q-fold rotational symmetry are flexibly adjusted. Using diffraction theory interfering vector Gaussian beams, an analytical wave function derived reconstruct polarization-resolved intensities of Stokes parameters measured in experiment. With good agreement between numerical experimental results, further employed characterize propagation-variant states polarization, providing fundamentally important information beams.

Language: Английский

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Nonparaxial accelerating waves as a superposition of nondiffracting Bessel-lattice optical fields

Journal of the Optical Society of America A, Journal Year: 2024, Volume and Issue: 41(4), P. 686 - 686

Published: March 7, 2024

In the first part of this work, we introduce a monochromatic solution to scalar wave equation in free space, defined by superposition nondiffracting half Bessel-lattice optical fields, which is determined two functions; one on frequency and other complete integral eikonal space. We obtain expressions for geometrical wavefronts, caustic region, Poynting vector. highlight that stable under small perturbations because it characterized hyperbolic umbilical type. second part, corresponding Maxwell equations

Language: Английский

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Multi-dimensional tunable arbitrary shape beams with engineered axial profile

Results in Physics, Journal Year: 2024, Volume and Issue: 59, P. 107584 - 107584

Published: March 18, 2024

Bessel beams, as one type of special light field, would significantly do benefit to several applications such light-sheet microscopy, particle manipulation and free-space optical communications. In this paper, we investigate the generation multi-dimensional tunable arbitrary shape beams with engineered axial profile based on superposition zero-order by designing angular spectrum, providing a universal method manipulate in terms longitudinal intensity, transverse wavevector distribution field shape. Through spectral analysis, demonstrate shape-invariant engineering circle, ellipse, parabolic, epicycloid-shaped well shape-variant self-acceleration, self-rotation, self-mode conversion, from both theoretical experimental perspectives. Our work provides deep insight into fundamental properties paves new way toward exploiting more dimensions for its future applications.

Language: Английский

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Polygonal Laguerre-Gauss beams

Optics Continuum, Journal Year: 2024, Volume and Issue: 3(4), P. 607 - 607

Published: March 21, 2024

We demonstrate that Laguerre-Gauss (LG) beams can have a polygonal distribution with the radial and azimuthal components, so-called beams. These light are generated linear trigonometric phase function of angular coordinate which transform Perfect LG lens. The preserve their within maximum propagation distance without diffraction similar to used in propagation-invariant fields. expect these will be method for creating any controlling components; moreover, they proposal control number ring structures

Language: Английский

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Shaping of Vector Beams Based on Caustic Design

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(8)

Published: April 9, 2024

Abstract Appropriate wavefront design can endow light fields with many useful properties, such as accelerating, anti‐diffracting, self‐healing, and the capability to exhibit customizable intensity shapes. The strategy of arbitrarily combining these properties develop novel optical mainly relies on caustic methods. However, methods have rarely been applied construction vector fields. Here, slowly changing polarization information is introduced rays, aiming establish direct connections between conventional rays beams in physical representation. In this manner, a technique developed create non‐diffracting states that vary along curves needed. It also demonstrated superposition intersecting ray families basically determine other points This may provide new route for designing various directly promote research wave focal field shaping, thereby offering more flexible beam options applications material processing, particle manipulation, microscopic imaging.

Language: Английский

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High-efficiency generation of long-distance, tunable, high-order nondiffracting beams

Photonics Research, Journal Year: 2024, Volume and Issue: 12(10), P. 2390 - 2390

Published: July 29, 2024

Nondiffracting beams (NDBs) have presented significant utility across various fields for their unique properties of self-healing, anti-diffraction, and high-localized intensity distribution. We present a versatile flexible method generating high-order nondiffracting predicated on the Fourier transformation polymorphic produced by free lenses with tunable shapes. Based tunability digital lenses, we demonstrate experimental generation long-distance beams, including Bessel generalized tilted asymmetric specially structured generated superposition beams. Our achieves efficiency up to about seven times compared complex beam shaping methods. The NDBs exhibit characteristics extended propagation distance high-quality profiles consistent theoretical predictions. proposed is anticipated find applications in laser processing, optical manipulation, other fields.

Language: Английский

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