Shaping perfect optical vortex with amplitude modulated using a digital micro-mirror device

Zhang, Chonglei; Min, Changjun; Yuan, Xiaocong

doi:10.1016/j.optcom.2016.07.009

Cited by 25 publications

(3 citation statements)

References 27 publications

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“…The most commonly used method for creating the PVB is Fourier transformation of the Bessel vortex beam [19][20][21], which is usually replaced by a BG vortex beam in reality. Here, the BG vortex beam is usually created by a computer-controlled liquid-crystal spatial light modulator (SLM) [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] or digital micromirror device (DMD) [35], a special designed hybrid phase plate [36], a transparent variable diffractive spiral axicon based on a single liquid-crystal cell [37], polymer-based phase plate [38], metasurface [39], Pancharatnam-Berry phase element [40], axicon [41][42][43], or diffraction of the BG vortex beam by using curved fork grating [44], and so on. In addition, the PVB can be directly generated by schemes including a computer-generated hologram (CGH) displayed on the reflective phase SLM [45][46][47][48] or the DMD [49,50], a radial phase shift spiral zone plate [51,52], a planar Pancharatnam-Berry (PB) phase element [53], or metasurfaces [54][55][56][57]…”

Section: Introductionmentioning

confidence: 99%

Generation of Perfect Vortex Beams with Complete Control over the Ring Radius and Ring Width

Tao,

Liang,

Zhang

et al. 2023

Photonics

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We have experimentally created perfect vortex beams (PVBs) by Fourier transformation of Bessel–Gaussian vortex beams, which are generated by modulating the fundamental Gaussian beam with the spiral phase plates and the axicons, respectively. Although the method has been used many times by other authors, as far as we know, few people pay attention to the quantitative relationship between the control parameters of the PVB and ring width. The effects of the waist radius of the fundamental Gaussian beam wg, base angle of the axicon γ, and focal length of the lens f on the spot parameters (ring radius ρ, and ring half-width Δ) of PVB are systematically studied. The beam pattern of the generated Bessel–Gaussian beam for different propagation distances behind the axicon and the fundamental Gaussian beam wg is presented. We showed experimentally that the ring radius ρ increases linearly with the increase of the base angle γ and focal length f, while the ring half-width Δ decreases with the increase of the fundamental beam waist radius wg, and increases with enlarging the focal length f. We confirmed the topological charge (TC) of the PVB by the interferogram between the PVB and the reference fundamental Gaussian beam. We also studied experimentally that the size of the generated PVB in the Fourier plane is independent of the TCs. Our approach to generate the PVB has the advantages of high-power tolerance and high efficiency.

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Section: Introductionmentioning

confidence: 99%

Generation of Perfect Vortex Beams with Complete Control over the Ring Radius and Ring Width

Tao,

Liang,

Zhang

et al. 2023

Photonics

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“…[6] To solve this problem, Ostrosky et al proposed the concept of the perfect optical vortex (POV), [7] which exhibits a constant intensity profile and a radius irrespective of the TC. [8,9] For conventional OV and POV beams, the OAM distribution on the ring is uniform. This uniformity is not suitable for applications where versatile OAM distributions are needed, e.g., multiparticle trapping and manipulation.…”

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confidence: 99%

Multichannel Superposition of Grafted Perfect Vortex Beams

et al. 2022

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The OV beam can be converted into a doughnut-shaped ring with the transverse component of Poynting vectors. Owing to the azimuthally dependent phase, an OV beam possesses an orbital angular momentum (OAM), which plays a vital role in various applications such as optical communications, [2] optical imaging, [3] particle manipulation, [4] and OAM microlasers. [5] The diameter of the light ring is strongly dependent on the TC, hindering the coupling of multiple OVs in an optical fibre. [6] To solve this problem, Ostrosky et al. proposed the concept of the perfect optical vortex (POV), [7] which exhibits a constant intensity profile and a radius irrespective of the TC. [8,9] For conventional OV and POV beams, the OAM distribution on the ring is uniform. This uniformity is not suitable for applications where versatile OAM distributions are needed, e.g., multiparticle trapping and manipulation. Therefore, noncanonical optical vortices are proposed to tackle these challenges. Examples include spiral OAM distributions, [10] nonuniform hollow circular OAM distributions, [11] and structured OAM distributions. [12] However, these OAM distributions are strongly dependent on the intensity and the local OAM modulation is impossible. A grafted optical vortex, which is generated through grafting two or more spiral phase profiles of optical vortex beams, has a controllable OAM distribution and constant intensity. [13] Recently, grafted perfect vortex beams (GPVBs) have attracted much attention due to their unique optical properties (e.g., versatile OAM distributions) and potential applications (e.g., more options for particle manipulation). However, the generation and manipulation of GPVBs are more challenging and complicated due to the involvement of an additional phase profile of a lens and that of an axicon. The optical setups currently being used for generating GPVBs are complex, requiring numerous optical components, including spatial light modulators, lenses, pinhole filters, polarizers, and dichroic mirrors, [13] which result in large space requirement and high cost. These optical systems are impractical for many applications, and hence there is a pressing requirement for a compact, simple, and efficient approach to generating and manipulating GPVBs.Optical metasurfaces have been used in a range of ultrathin optical devices, including metalenses, [14][15][16][17][18] polarization detectors, [19][20][21] holograms, [22][23][24][25] and high-resolution imaging. [26,27]

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“…Theoretically, PV beam is the Fourier transformation of a Bessel Gaussian (BG) beam 4 . Plenty of schemes have been proposed to obtain the PV beams including using spatial light modulator 3 4 5 6 7 , axicon 8 9 , interferometer 10 , and micro-mirror devices 11 . Optical manipulation based on the tightly focused field of PV beams has also been extensively studied 8 12 .…”

mentioning

confidence: 99%

Generation of perfect vortex and vector beams based on Pancharatnam-Berry phase elements

Liu

Zhou

et al. 2017

Sci Rep

157

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Perfect vortex beams are the orbital angular momentum (OAM)-carrying beams with fixed annular intensities, which provide a better source of OAM than traditional Laguerre-Gaussian beams. However, ordinary schemes to obtain the perfect vortex beams are usually bulky and unstable. We demonstrate here a novel generation scheme by designing planar Pancharatnam-Berry (PB) phase elements to replace all the elements required. Different from the conventional approaches based on reflective or refractive elements, PB phase elements can dramatically reduce the occupying volume of system. Moreover, the PB phase element scheme is easily developed to produce the perfect vector beams. Therefore, our scheme may provide prominent vortex and vector sources for integrated optical communication and micromanipulation systems.

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Shaping perfect optical vortex with amplitude modulated using a digital micro-mirror device

Cited by 25 publications

References 27 publications

Generation of Perfect Vortex Beams with Complete Control over the Ring Radius and Ring Width

Generation of Perfect Vortex Beams with Complete Control over the Ring Radius and Ring Width

Multichannel Superposition of Grafted Perfect Vortex Beams

Generation of perfect vortex and vector beams based on Pancharatnam-Berry phase elements

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