Experimental observation of a photonic hook

Minin, Igor V.; Minin, Oleg V.; Katyba, Gleb M.; Chernomyrdin, Nikita V.; Курлов, В. Н.; Zaytsev, Kirill I.; Yue, Liyang; Wang, Zengbo; Christodoulides, Demetrios N.

doi:10.1063/1.5065899

Cited by 101 publications

(61 citation statements)

References 32 publications

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“…That is, such structured light beams have the maximum acceleration among the known curvilinear beams -the curvature of electromagnetic waves with such a small radius were described for the first time in Refs. [26,27] and confirmed experimentally in this year 2019, by Minin and Minin and colleagues in THz [28]. The phenomenon of photonic hook was demonstrated also for surface plasmon wave [29] realized in the in-plane of the interface despite the strong energy dissipation at metal surface.…”

Section: Introductionmentioning

confidence: 70%

“…The AH have the potential to focus around obstacles that are directly in the beam path similar to optical [36,37]. It is interesting to comment that, due to the analogy between electromagnetic and acoustic waves, the curvatures  obtained experimentally in both cases are similar:  = 144º for THz waves [28] and = 148º…”

Section: Discussionmentioning

confidence: 92%

“…As a result, a curved light beam is produced at the exit from the particle (near it shadow surface). Photonic hook are unique in that their radius of curvature is substantially smaller than the wavelength [27,28]. That is, such structured light beams have the maximum acceleration among the known curvilinear beams -the curvature of electromagnetic waves with such a small radius were described for the first time in Refs.…”

Section: Introductionmentioning

confidence: 99%

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Acoustical hooks: A new subwavelength self-bending beam

2020

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In this work, we report the observation of a new type of near-field curved acoustic beam different from the Airy-family beams both through simulations and experiment. This new self-bending acoustical beam is generate from a rectangular trapezoid of a polymer material immersed in water and has unique features. The radius of curvature of acoustical hook is less than the wavelength, it is represents the smallest radius of curvature ever recorded for any acoustical beams. The origin of this curved beam is in the vortices of intensity flow that appear inside the solid due to the conversion of the incident longitudinal wave mode to a shear wave in a solid. These vortices redirect the intensity flow, which causes the beam to bend. These results may be potentially useful when an object, that is in the path of the beam, must be avoid, such as in cancer treatments in which tumors are found behind bones such as ribs. It could also have potential applications in particle manipulations.

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Section: Introductionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Acoustical hooks: A new subwavelength self-bending beam

2020

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“…PH was later experimentally verified in the terahertz range [9], and further extended to the fields of surface plasmons and acoustic waves [10,11]. This intriguing phenomenon, in one sense, can be regarded as a curved photonic jet (PJ).…”

Section: Introductionmentioning

confidence: 92%

Photonic hooks from Janus microcylinders

Shao

Song

et al. 2019

Opt. Express

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Recently, a type of curved light beams, photonic hooks (PHs), was theoretically predicted and experimentally observed. The production of photonic hook (PH) is due to the breaking of structural symmetry of a plane-wave illuminated microparticle. Herein, we presented and implemented a new approach, of utilizing the symmetry-broken of the microparticles in material composition, for the generation of PHs from Janus microcylinders. Finite element method based numerical simulation and energy flow diagram represented theoretical analysis were used to investigate the field distribution characteristics and formation mechanism of the PHs. The full width at half-maximum (FWHM) of the PH (~0.29λ) is smaller than the FWHM of the photonic nanojet (~0.35λ) formed from a circular microcylinder with the same geometric radius. By changing the refractive index contrasts between upper and lower half-cylinders, or rotating the Janus microcylinder relative to the central axis, the shape profiles of the PHs can be efficiently modulated. The tunability of the PHs through simple stretching or compression operations, for the Janus microcylinder constituted by one solid inorganic halfcylinder and the other flexible polymer half-cylinder, was studied and discussed as well.

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“…The influence of the particle sizes, refractive indices and the prism angles were investigated as well. The photonic hooks were experimentally observed in terahertz range [14], and surface plasmons and acoustic waves were used to produce photonic hooks later [15], [16]. These curved beams have special use in nanoscale manipulation as optical tweezes [9].…”

Section: Introductionmentioning

confidence: 99%

Twin Photonic Hooks Generated by Twin-Ellipse Microcylinder

Shen

Shao

et al. 2020

IEEE Photonics J.

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Recently, two special photonic jets, photonic hooks and twin photonic jets, have been proposed to deal with complex conditions in nanoscale manipulation. Photonic hooks are generated by a single light plane wave and an asymmetric microparticle, while the twin photonic jets are produced by two incident light beams. In this letter, we presented and demonstrate a method to combine photonic hooks and twin photonic jets. A single light plane wave and a symmetric microparticle, twin-ellipse microcylinder, are used in this research. The curvature degree, length and maximum E 2 filed enhancement of twin photonic hooks are varied significantly, with the change of refractive indices and shape of twin-ellipse microcylinder. And a liquid-immersed core-shell is built to achieve a flexible tunability. _____________________________ a) Electronic

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Experimental observation of a photonic hook

Cited by 101 publications

References 32 publications

Acoustical hooks: A new subwavelength self-bending beam

Acoustical hooks: A new subwavelength self-bending beam

Photonic hooks from Janus microcylinders

Twin Photonic Hooks Generated by Twin-Ellipse Microcylinder

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