Dynamic tracking with simultaneous edge enhancement

Sierra-Sosa, Daniel; Isaza-Monsalve, Mariano; Ángel-Toro, Luciano; Tebaldi, Myrian

doi:10.1016/j.ijleo.2017.09.050

Cited by 3 publications

(2 citation statements)

References 16 publications

(19 reference statements)

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“…The singularities are located where both the imaginary and real parts from complex signals are null. Note that in the surrounding of the phase singularity, the real and imaginary parts of the signal can be expressed as [26]:…”

Section: Vortex Tracking Techniquementioning

confidence: 99%

Vortex technique to track 3D object displacement in CGH

Amado¹,

Velez-Zea²,

Tebaldi³

2022

J. Opt.

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In this work, we introduce and test a technique to track the movement of objects from computer-generated holographic videos, without the need for reconstruction. To achieve this, we first generated holographic videos of moving 3D objects using a random phase layer-based approach. Then, we analyzed the hologram phase to determine the locations of the optical vortices. We used the core properties of each vortex to track its movement over all the frames of the video, and then establish a relationship between the object and the vortex movement. We also tested the vortex tracking over a pseudo-phase obtained by performing the Laguerre-Gauss transform of the hologram, which enables more precise control over the number of optical vortices that can be tracked. Our proposal was tested with holographic videos generated with one and two objects, using two different hologram generation approaches.

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Section: Vortex Tracking Techniquementioning

confidence: 99%

Vortex technique to track 3D object displacement in CGH

Amado¹,

Velez-Zea²,

Tebaldi³

2022

J. Opt.

Self Cite

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“…[3,4] The twisted phase profile results in a doughnut-shaped intensity profile. Such hollow beams carrying OAM have attracted much attention due to numerous applications in classical and quantum optics, including optical micromanipulation, [5,6] optical communication, [7,8] super-resolution and edge-enhanced detection, [9,10] and quantum entanglement. [11,12] Typically, in order to integrate the twisted helical mode into the wavefront of a paraxial beam for the generation of OV beams, spiral phase plates, [13] spatial light modulators, [14] pitch-fork holograms, [15] or laser mode conversion [16] are used.…”

mentioning

confidence: 99%

High‐Efficiency Broadband Achromatic Metadevice for Spin‐to‐Orbital Angular Momentum Conversion of Light in the Near‐Infrared

Xie,

Wan,

et al. 2024

Small Science

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Spin‐orbital angular momentum conversion (SOC) of light has found applications in classical and quantum optics. However, the existing SOC elements suffer severe restrictions on broadband integrated applications at miniature scales, due to bulky configurations, single function, and failing to control the dispersion. Herein, a high‐efficiency broadband achromatic method for independently and elaborately engineering the dispersion and the SOC of light based on a cascaded metasurface device is proposed. The metadevice is capable of efficiently decoupling the SOC from the modulation of dispersion with high‐broadband focusing efficiency up to 75%. For the proof of concept, the generation of high‐efficiency achromatic‐focused and spin‐controlled optical vortices with switchable topological charge ( and ) is successfully demonstrated. The presence of achromatically and highly concentrated optical vortices with tunable photonic angular momentum using spin as an optical knob makes the proposed ultracompact and multifunctional metadevice a promising platform for optical micromanipulation at nanoscale dimensions.

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