Negative propagation effect in nonparaxial Airy beams

Vaveliuk, Pablo; Martínez-Matos, Óscar

doi:10.1364/oe.20.026913

Cited by 51 publications

(24 citation statements)

References 35 publications

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“…(c)). Analysis presented in Ref . concludes that the break up of the beam shape occurs exclusively due to the propagating component of the radiation while the interference of the propagating and evanescent waves can cause an inversion of energy flow (negative propagation) for some of the beam lobes.…”

Section: Non‐paraxial Casementioning

confidence: 99%

Airy plasmons: non‐diffracting optical surface waves

Minovich

Klein

Neshev

et al. 2013

Laser & Photonics Reviews

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Airy beams represent an important class of nondiffracting waves which can be realized on a flat surface. Being generated in the form of surface-plasmon polaritons, such Airy plasmons demonstrate many remarkable properties: they do not diffract while propagating along parabolic trajectories, and they recover their shape after passing through obstacles. This paper reviews the basic physics of Airy plasmons in both paraxial and non-paraxial cases, and describes the experimental methods for generation of Airy surface waves on metal surfaces, including a control of their trajectories, as well as the interference of Airy plasmons and hot-spot generation. Many unusual properties of Airy plasmons can be utilized for useful applications, including plasmonic circuitry and surface tweezers. Picture: Observation of two colliding Airy plasmons.

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Section: Non‐paraxial Casementioning

confidence: 99%

Airy plasmons: non‐diffracting optical surface waves

Minovich

Klein

Neshev

et al. 2013

Laser & Photonics Reviews

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“…An analytic expression for an SAB was not found. However, its paraxial solution vx; z can easily be built by using the angular spectrum formalism [15] vx;z 1 (2) where VK;z ≡ F fvx;zg and the even cubic phase enters the argument of V 0 :…”

mentioning

confidence: 99%

Symmetric Airy beams

et al. 2014

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In this Letter a new class of light beam arisen from the symmetrization of the spectral cubic phase of an Airy beam is presented. The symmetric Airy beam exhibits peculiar features. It propagates at initial stages with a single central lobe that autofocuses and then collapses immediately behind the autofocus. Then, the beam splits into two specular off-axis parabolic lobes like those corresponding to two Airy beams accelerating in opposite directions. Its features are analyzed and compared to other kinds of autofocusing beams; the superposition of two conventional Airy beams having opposite accelerations (in rectangular coordinates) and also to the recently demonstrated circular Airy beam (in cylindrical coordinates). The generation of a symmetric Airy beam is experimentally demonstrated as well. Besides, based on its main features, some possible applications are also discussed.

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“…Relying on the decomposition of the Poynting vector in two constituents corresponding to the orbital energy and spin flows, we offer an interpretation of the reverse energy flow, which has been known in optics for quite long (since 1919 [31,7]) but has so far failed to obtain the proper interpretation. Energy backflow is a rather universal optical phenomenon that occurs not only in sharp focus, but also in some laser beams like, e.g., vector X-waves [32], nonparaxial Airy beams [33] and fractional Bessel vortex beams [34]. Below, we prove that the reverse energy flow occurs in the optical field regions where the on-axis projection of the spin flow is negative and larger in magnitude than the always positive onaxis projection of the orbital energy flow.…”

Section: Introductionmentioning

confidence: 61%

Orbital Energy and Spin Flows in a Strong Focus of Laser Light

2020

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In this work, we derive analytical relations for all projections of the orbital energy flow and spin flow in the focal plane of a strongly focused left-hand circularly polarized Gaussian beam, also calculating a torque exerted upon a dielectric ellipsoidal microparticle in the focus of the beam and discussing results of an experiment on rotating the microparticle around its center of mass. The on-axis projection of the torque exerted upon the microparticle is found to be negative, i.e. directed oppositely to the beam propagation axis. Such a torque is supposed to induce a clockwise rotation of a non-absorbing dielectric particle around its center of mass. We have been demonstrated that a reverse energy flow occurs in the light field regions where the longitudinal projection of the spin flow is negative and larger in magnitude than the longitudinal projection of the orbital energy flow, which is always positive.

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Negative propagation effect in nonparaxial Airy beams

Cited by 51 publications

References 35 publications

Airy plasmons: non‐diffracting optical surface waves

Airy plasmons: non‐diffracting optical surface waves

Symmetric Airy beams

Orbital Energy and Spin Flows in a Strong Focus of Laser Light

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