Shaping symmetric Airy beam through binary amplitude modulation for ultralong needle focus

Fang, Zhao-Xiang; Ren, Yu-Xuan; Gong, Lei; Vaveliuk, Pablo; Chen, Yue; Lu, Rengui

doi:10.1063/1.4936200

Cited by 39 publications

(8 citation statements)

References 39 publications

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“…It is observed that the curved main lobe of AB is not broken by the obstacle, except at its neighborhood, confirming its self-healing feature. Our simulations provide evidence that the SAB also presents a self-healing characteristic supporting preliminary results obtained in [28]. In fact, notice that the main symmetric specular lobes are not affected by the perturbation except at its neighborhood.…”

Section: Theoretical Resultssupporting

confidence: 76%

Dual behavior of caustic optical beams facing obstacles

et al. 2017

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A full propagation analysis on both fold-type and cusp-type caustic optical beams under various setups of obstructions is theoretically and experimentally performed. It is demonstrated that the self-healing property of caustic optical beams that include the famous Airy beam is a quite relative property. In fact, fold-type and cusp-type beams cannot only behave as self-healing beams by blocking the main intensity peak, but also behave as self-breaking ones in a nonintuitive manner: by blocking a lateral side of the beam without touching the central intensity peak. The regeneration and rupture processes of caustic beams follow a nonlocal propagation dynamic unlike the other conventional beams. Moreover, deep differences between fold and cusp caustic beams are pointed out once facing certain obstructions. The cusp-caustic beam can be broken down by the obstacle placed in a dark zone outside the caustic region, while the fold-type one remains unaltered. This beam rupture confirms the key role of a hidden propagating field in the shadow region for cusp beams that coexist with the evanescent one. The obtained results cast down the established idea that the Airy beam is a robust self-healing beam since any caustic beam can behave in a dual manner depending on the obstruction location. These facts open up different perspectives for the applications in which the self-healing properties of the beam are relevant.

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Section: Theoretical Resultssupporting

confidence: 76%

Dual behavior of caustic optical beams facing obstacles

et al. 2017

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“…In contrast, the 0th-order Bessel-Gaussian beam shows a needle-like structure near the focus (Figure 2F). Such needle-like focus structure could also be created by other types of non-diffracting beams like the symmetric Airy beam (SAB) [42].…”

Section: Bessel and Airy Beamsmentioning

confidence: 99%

“…symmetric CPM to produce the SAB [42]. Broadband polarization-insensitive operation of the DMD allows the modulation of light from the ultraviolet to near-infrared spectrum.…”

Section: Spatial Light Modulatormentioning

confidence: 99%

Non-Diffracting Light Wave: Fundamentals and Biomedical Applications

Ren

Tang

et al. 2021

Front. Phys.

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The light propagation in the medium normally experiences diffraction, dispersion, and scattering. Studying the light propagation is a century-old problem as the photons may attenuate and wander. We start from the fundamental concepts of the non-diffracting beams, and examples of the non-diffracting beams include but are not limited to the Bessel beam, Airy beam, and Mathieu beam. Then, we discuss the biomedical applications of the non-diffracting beams, focusing on linear and nonlinear imaging, e.g., light-sheet fluorescence microscopy and two-photon fluorescence microscopy. The non-diffracting photons may provide scattering resilient imaging and fast speed in the volumetric two-photon fluorescence microscopy. The non-diffracting Bessel beam and the Airy beam have been successfully used in volumetric imaging applications with faster speed since a single 2D scan provides information in the whole volume that adopted 3D scan in traditional scanning microscopy. This is a significant advancement in imaging applications with sparse sample structures, especially in neuron imaging. Moreover, the fine axial resolution is enabled by the self-accelerating Airy beams combined with deep learning algorithms. These additional features to the existing microscopy directly realize a great advantage over the field, especially for recording the ultrafast neuronal activities, including the calcium voltage signal recording. Nonetheless, with the illumination of dual Bessel beams at non-identical orders, the transverse resolution can also be improved by the concept of image subtraction, which would provide clearer images in neuronal imaging.

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“…In order to verify these findings, the creation of APPB is implemented through a digital micromirror device (DMD). The advantage of DMD is its capability to present the diffractive patterns with a considerably fast speed 32 . Entire modulation over the complex amplitude modulation is achieved through binary amplitude holograms designed by a super-pixel algorithm 33 .…”

Section: Introductionmentioning

confidence: 99%

Accelerating polygon beam with peculiar features

Fang

Zhao

Chen

et al. 2018

Sci Rep

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We report on a novel kind of accelerating beams that follow parabolic paths in free space. In fact, this accelerating peculiar polygon beam (APPB) is induced by the spectral phase symmetrization of the regular polygon beam (RPB) with five intensity beam (RPB) with five intensity peaks, and it preserves a peculiar symmetric structure during propagation. Specially, such beam not only exhibits autofocusing property, but also possesses two types of accelerating intensity maxima, i.e., the cusp and spot-point structure, which does not exist in the previously reported accelerating beams. We also provide a detailed insight into the theoretical origin and characteristics of this spatially accelerating beam through catastrophe theory. Moreover, an experimental scheme based on a digital micromirror device (DMD) with the binary spectral hologram is proposed to generate the target beam by precise modulation, and a longitudinal needle-like focus is observed around the focal region. The experimental results confirm the peculiar features presented in the theoretical findings. Further, the APPB is verified to exhibit self-healing property during propagation with either obstructed cusp or spot intensity maxima point reconstructing after a certain distance. Hence, we believe that the APPB will facilitate the applications in the areas of particle manipulation, material processing and optofludics.

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Shaping symmetric Airy beam through binary amplitude modulation for ultralong needle focus

Cited by 39 publications

References 39 publications

Dual behavior of caustic optical beams facing obstacles

Dual behavior of caustic optical beams facing obstacles

Non-Diffracting Light Wave: Fundamentals and Biomedical Applications

Accelerating polygon beam with peculiar features

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