Opto-Electronics Review

Angelsky, Oleg V.; Bekshaev, Aleksandr Ya.; Mokhun, Igor I.; Vasnetsov, Mikhail V.; Zenkova, Claudia Yu.; Hanson, Steen G.; Zheng, Jun

doi:10.24425/opelre.2022.140860

Cited by 5 publications

(11 citation statements)

References 189 publications

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“…A characteristic feature of 3D fields is the existence of the longitudinal electric and/or magnetic components, commensurate to the usual transverse ones [23][24][25][42][43][44]. In paraxial beams, this fact is responsible for a set of fine effects concerning the polarization-dependent deviations from the geometric-optics beam trajectory [51][52][53].…”

Section: Non-paraxial Fields and Genuine 3d Polarization Statesmentioning

confidence: 99%

“…Such points normally belong to specific lines or contours, closed within the observable regions or open (closed at infinity), where the field amplitude is zero. These objects demonstrate a complex of unique physical properties, due to which the same objects are referred to by various terms: phase singularities, wavefront dislocations, isolated amplitude zeros, optical vortices (OVs) [23][24][25][60][61]. A common example of the circular light beams of this sort is the Laguerre-Gaussian mode of a laser resonator [60][61][62], which spectacularly illustrates the main physical attributes: the helical dependence of the phase near the singularity core ~exp ± ilφ (13) where φ is the azimutal angle, the phase increment on a roundtrip near the core 2lπ where l is an integer topological charge of the singularity, and the transverse energy circulation due to which the beam carries an orbital angular momentum (OAM) with respect to the propagation axis, with the numerical value lħ per photon.…”

Section: Poincaré Sphere and Its Generalizationsmentioning

confidence: 99%

“…Each particle experiences a complex mechanical action caused by a complex of ponderomotive factors. In particular, the optical forces are associated with the optical field inhomogeneity and the internal energy flow (field momentum components) [23][24][25], which redistribute the particles to the regions of maximum light intensity. Additionally, there exists the photophoretic force associated with inhomogeneous heating of the absorbing particles [111][112][113][114], which moves the particles to the intensity minimum.…”

Section: Light-induced Gratings and Self-diffraction Of Laser Radiati...mentioning

confidence: 99%

“…Its dependence on time is slow with respect to the oscillation period 2π/ω, which is reflected by the "slow-time" argument τ. The slow-time complex function E(R, τ) supplies a suitable instrument for description and analysis of such waves [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…An important special class of light fields is the so called paraxial waves [23][24][25] where the physically selected longitudinal direction (propagation direction) z exists, and the rate of the field amplitude variations along z is much lower than that in the transverse (x, y) plane; in turn, the characteristic variations' scale in the transverse plane is much higher than the vacuum wavelength λ 2π/k (k ω/c is the wave number). In such situations, the electric vector is nearly transverse and can be described by the complex amplitude distribution…”

Section: Introductionmentioning

confidence: 99%

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Correlation Optics, Coherence and Optical Singularities: Basic Concepts and Practical Applications

et al. 2022

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The main idea of this review is to trace the interrelations and inter-transitions between the basic concepts and approaches of the correlation optics (including the light coherence) and the singular optics dealing with networks of “exceptional” points of light fields. The principles and examples are described of formation of light fields with required structures (amplitude, phase and polarization distributions, spectral properties as well as the internal energy flows and energy gradients responsible for optical forces) via superpositions of model optical fields of simple standard configurations and under controllable correlation conditions. The theoretical and experimental results, obtained by the authors and other researchers, demonstrate possibilities of the general approach to the complex fields formation with spatial and polarization inhomogeneities. A special topic, considered in more detail, is the interaction of structured optical fields with the media containing suspended micro- and nanoparticles, their inhomogeneous heating by the laser radiation and the accompanying self-diffraction and self-focusing phenomena. Possible light-induced phase transitions and controllable generation of the gas-vapor microbubbles in the medium are discussed. Specific optical singularities in polychromatic light fields are analyzed in connection to the field coherence. Some experimental solutions for revealing the fine structure of optical fields by means of the interference schemes are presented. Practical applications for the micromanipulation techniques, optical diagnostics of remote and random objects, optical treatment and laboratory practice in biology and medicine are described and discussed.

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Section: Non-paraxial Fields and Genuine 3d Polarization Statesmentioning

confidence: 99%

Section: Poincaré Sphere and Its Generalizationsmentioning

confidence: 99%

Section: Light-induced Gratings and Self-diffraction Of Laser Radiati...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Correlation Optics, Coherence and Optical Singularities: Basic Concepts and Practical Applications

et al. 2022

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Transformations of the transverse Poynting vector distribution upon diffraction of a circularly polarized paraxial beam

Mokhun,

Galushko,

Viktorovskaya

et al. 2024

J. Opt. Soc. Am. A

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Usually, the structure of paraxial light beams is characterized by the intensity associated with distribution of the longitudinal energy flow density (Poynting momentum) across the transverse plane. In this work, special attention is paid to the distribution of internal energy flows described by the transverse Poynting momentum (TPM) components. This approach discloses additional polarization-dependent features of the vector beam transformations; in application to the edge diffraction of a circularly polarized (CP) Gaussian beam, it reveals the helicity-dependent asymmetry of the diffracted-field TPM profile characterized by the shifts of the TPM singularity, maximum, etc. These phenomena are confirmed experimentally and interpreted in terms of the spin-orbit interaction (SOI) and spin Hall effect of light. In contrast to the known SOI manifestations in the CP beams’ diffraction originating from the small longitudinal component of a paraxial field, the new TPM-related effects stem from the transverse field components and are thus much higher in magnitude.

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Optical phase singularities: Physical nature, manifestations and applications

Angelsky

Bekshaev²,

Vasnetsov³

et al. 2022

Front. Phys.

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Over the past 30 years, physical optics has been enriched by the appearance of singular optics as a new branch approved in scientific classifiers. This review briefly outlines the main concepts of the singular optics, their role in physical research and applications, and prospects of further development. The wave singularities are considered as a sort of structured-light elements and analyzed based on the generic example of screw wavefront dislocation (optical vortex). Their specific topological and mechanical properties associated with the transverse energy circulation are discussed. Peculiar features of the non-linear optical phenomena with singular fields are exhibited, with the special attention to generation of multidimensional entangled quantum states of photons. Optical fields with multiple singularities, especially, the stochastic speckle fields, are discussed in the context of optical diagnostics of random scattering objects. The exact and approximate correspondences between characteristic parameters of the optical-field intensity and phase distributions are analyzed with the aim of recovering phase information from the intensity measurements (“phase problem” solution). Rational singularity-based approaches to informative measurements of the scattered-field distribution are discussed, as well as their employment for the objects’ diagnostics. In particular, the practical instruments are described for the high-precision rough-surface testing. Possible enhancements of the singular-optics ideas and concepts in a wider context, including the transformation optics, near-field optics (surface waves), partially-coherent fields, and wave fields of other physical nature, are briefly exposed.

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Opto-Electronics Review

Cited by 5 publications

References 189 publications

Correlation Optics, Coherence and Optical Singularities: Basic Concepts and Practical Applications

Correlation Optics, Coherence and Optical Singularities: Basic Concepts and Practical Applications

Transformations of the transverse Poynting vector distribution upon diffraction of a circularly polarized paraxial beam

Optical phase singularities: Physical nature, manifestations and applications

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