Greg Gbur
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View article: Evolution of C-point singularities and polarization coverage of Poincaré–Bessel beam in self-healing process
Evolution of C-point singularities and polarization coverage of Poincaré–Bessel beam in self-healing process Open
As a vector version of scalar Bessel beams, Poincaré–Bessel beams (PBBs) have attracted a great deal of attention due to their non-diffracting and self-healing properties as well as the presence of polarization singularities. Previous stud…
View article: Evolution of C-point singularity and polarization coverage of Poincare-Bessel beam in self-healing process
Evolution of C-point singularity and polarization coverage of Poincare-Bessel beam in self-healing process Open
As a vector version of scalar Bessel beams, Poincare-Bessel beams (PBBs) have attracted a great deal of attention due to their non-diffracting and self-healing properties as well as the presence of polarization singularities. Previous stud…
View article: Orbital angular momentum spectrum of model partially coherent beams in turbulence
Orbital angular momentum spectrum of model partially coherent beams in turbulence Open
The use of partial coherence has been extensively studied as a potential solution to mitigate the destructive effects of atmospheric turbulence in optical applications involving the free space propagation of light. However, in OAM-based op…
View article: Lissajous singularities in Young’s interference experiment
Lissajous singularities in Young’s interference experiment Open
We explore the interference of two bichromatic vector beams in Young’s interference experiment. Our analysis focuses on determining the conditions under which the superposition of such beams, emerging from the pinholes, can give rise to Li…
View article: Switch of orbital angular momentum flux density of partially coherent vortex beams
Switch of orbital angular momentum flux density of partially coherent vortex beams Open
We investigate the orbital angular momentum (OAM) flux density of beams which are the incoherent superposition of partially coherent vortex (PCV) beams with different topological charges and beam widths. Simulation results show that such b…
View article: Deterministic vortices evolving from partially coherent fields
Deterministic vortices evolving from partially coherent fields Open
Optical vortices—lines of zero intensity around which the field phase has a circulating or helical structure—have become important tools for many applications such as imaging, trapping, and communications. It has long been assumed, however…
View article: Polarization coverage and self-healing characteristics of Poincaré-Bessel beam
Polarization coverage and self-healing characteristics of Poincaré-Bessel beam Open
As a vector version of scalar Bessel beams, Poincaré-Bessel beams (PBBs) have attracted a great deal of attention due to the presence of polarization singularities and their nondiffraction and self-healing properties. Previous studies of P…
View article: Simple experimental realization of optical Hilbert Hotel using scalar and vector fractional vortex beams
Simple experimental realization of optical Hilbert Hotel using scalar and vector fractional vortex beams Open
Historically, infinity was long considered a vague concept—boundless, endless, larger than the largest—without any quantifiable mathematical foundation. This view changed in the 1800s through the pioneering work of Georg Cantor, who showed…
View article: Deterministic vortices evolving from partially coherent fields
Deterministic vortices evolving from partially coherent fields Open
It has long been assumed that there is an intrinsic conflict between optical vortices and partial coherence, in that deterministic phase vortices do not appear in partially coherent fields. We demonstrate, however, that it is possible to c…
View article: Simple experimental realization of optical Hilbert Hotel using scalar and vector fractional vortex beams
Simple experimental realization of optical Hilbert Hotel using scalar and vector fractional vortex beams Open
Historically, infinity was long considered a vague concept - boundless, endless, larger than the largest - without any quantifiable mathematical foundation. This view changed in the 1800s through the pioneering work of Georg Cantor showing…
View article: Evolution of the orbital angular momentum flux density of partially coherent vortex beams in atmospheric turbulence
Evolution of the orbital angular momentum flux density of partially coherent vortex beams in atmospheric turbulence Open
We investigate the behavior of the orbital angular momentum (OAM) flux density of partially coherent vortex (PCV) beams in atmospheric turbulence. It is shown that for PCV beams with different spatial coherence structures, the OAM flux den…
View article: 100 years of Emil Wolf: introduction
100 years of Emil Wolf: introduction Open
The groundbreaking research and ideas introduced by Emil Wolf continue to inspire researchers and motivate ongoing research in the wave properties of light. This special issue commemorates the legacy of Emil Wolf with research in physical …
View article: Generalization of Malus’ law and spatial coherence relations for linear polarizers and non-uniform polarizers
Generalization of Malus’ law and spatial coherence relations for linear polarizers and non-uniform polarizers Open
We study the transmission of partially polarized, partially coherent beams through linear polarizers and polarization elements that are non-uniform. An expression for the transmitted intensity, which reproduces Malus’ law for special cases…
View article: Massive Parallel Sorting of Particles Using Unwound Polygonal Vortex Beams
Massive Parallel Sorting of Particles Using Unwound Polygonal Vortex Beams Open
Optical sorting, as one kind of optical tweezers, is used to separate mixed particles in a background environment. This unusual tool has a wide application prospect because the non-contact and non-destructive advantages ideally suit the pr…
View article: Dynamic aerosol and dynamic air-water interface curvature effects on a 2-Gbit/s free-space optical link using orbital-angular-momentum multiplexing
Dynamic aerosol and dynamic air-water interface curvature effects on a 2-Gbit/s free-space optical link using orbital-angular-momentum multiplexing Open
When an orbital-angular-momentum (OAM) beam propagates through the dynamic air–water interface, the aerosol above the water and the water surface curvature could induce various degradations (e.g., wavefront distortion, beam wandering, scat…
View article: Second-order statistical properties of conjugate mode “double-H” partially coherent beams in turbulence
Second-order statistical properties of conjugate mode “double-H” partially coherent beams in turbulence Open
We present an analysis of the propagation properties of a recently introduced class of conjugate mode partially coherent beams (called “double- H " beams) in a turbulent atmosphere using the extended Huygens-Fresnel integral. We investigat…
View article: Controlled Coherence Plasmonic Light Sources
Controlled Coherence Plasmonic Light Sources Open
Through a computational model, we study the coherence converting capabilities of an array of holes in a surface plasmon-supporting metal plate, with an eye towards the creation of controlled coherence plasmonic light sources. We evaluate h…
View article: High order plasmonic vortex generation based on spiral nanoslits
High order plasmonic vortex generation based on spiral nanoslits Open
Highly localized plasmonic vortices carrying orbital angular momentum are of importance for many applications. Yet, it is a challenge to generating plasmonic vortex with a high topological charge because of no available technique. Here, a …
View article: Unified matrix representation for spin and orbital angular momentum in partially coherent beams
Unified matrix representation for spin and orbital angular momentum in partially coherent beams Open
A matrix representation is introduced for stationary beam-like light fields\nthat allows for simultaneous treatment of the orbital angular momentum (OAM)\nand the second-order state of spatial coherence. This Coherence-OAM matrix is a\ncou…
View article: Correlation-induced orbital angular momentum changes
Correlation-induced orbital angular momentum changes Open
We demonstrate that the orbital angular momentum flux density of a paraxial\nlight beam can change on propagation in free space. These changes are entirely\ndue to the spatial coherence state of the source, and the effect is analogous\nto …
View article: Propagation of radially polarized Hermite non-uniformly correlated beams in a turbulent atmosphere
Propagation of radially polarized Hermite non-uniformly correlated beams in a turbulent atmosphere Open
We study the propagation properties of a recently introduced class of structured beams, radially polarized Hermite non-uniformly correlated (RPHNUC) beams, in a turbulent atmosphere using the extended Huygens-Fresnel integral and investiga…
View article: Singularities of Partially Polarized Vortex Beams
Singularities of Partially Polarized Vortex Beams Open
Singularities in the polarization state of non-uniform electromagnetic beams have been a topic of both theoretical and practical interest for many years, as have singularities in the correlation functions of random scalar wavefields. Howev…
View article: Partially coherent radially polarized fractional vortex beam
Partially coherent radially polarized fractional vortex beam Open
A new kind of partially coherent vector beam, named a partially coherent radially polarized fractional vortex (PCRPFV) beam, is introduced as a natural extension of the recently introduced scalar partially coherent fractional vortex beams …
View article: The evolution of spectral intensity and orbital angular momentum of twisted Hermite Gaussian Schell model beams in turbulence
The evolution of spectral intensity and orbital angular momentum of twisted Hermite Gaussian Schell model beams in turbulence Open
We introduce a new class of twisted partially coherent beams with a non-uniform correlation structure. These beams, called twisted Hermite Gaussian Schell model (THGSM) beams, have a correlation structure related to Hermite functions and a…
View article: Scintillation properties of a partially coherent vector beam with vortex phase in turbulent atmosphere
Scintillation properties of a partially coherent vector beam with vortex phase in turbulent atmosphere Open
We undertake a computational and experimental study of an advanced class of structured beams, partially coherent radially polarized vortex (PCRPV) beams, on propagation through atmospheric turbulence. A computational propagation model is e…
View article: Spiral spectrum of a Laguerre-Gaussian beam propagating in anisotropic non-Kolmogorov turbulent atmosphere along horizontal path
Spiral spectrum of a Laguerre-Gaussian beam propagating in anisotropic non-Kolmogorov turbulent atmosphere along horizontal path Open
Close to the ground, it is generally known that atmospheric turbulence exhibits strong anisotropy, which affects the performance of applications such as free-space optical (FSO) communication. In this paper, we establish a theoretical mode…
View article: Using superoscillations for superresolved imaging and subwavelength focusing
Using superoscillations for superresolved imaging and subwavelength focusing Open
It is now well-appreciated that a bandlimited wave can possess oscillations much more rapidly than those predicted by the bandlimit itself, in a phenomenon known as superoscillation. Such superoscillations are required to be of dramaticall…
View article: Rectangular Hermite non-uniformly correlated beams and its propagation properties
Rectangular Hermite non-uniformly correlated beams and its propagation properties Open
We introduce a new class of non-uniformly correlated beams that are called rectangular Hermite non-uniformly correlated (RHNUC) beams, which possess rectangular symmetry in their degree of coherence. It is shown that, in free space and in …
View article: Propagation properties of Hermite non-uniformly correlated beams in turbulence
Propagation properties of Hermite non-uniformly correlated beams in turbulence Open
We study the propagation properties (intensity, degree of coherence and scintillation) of a new class of beams in a turbulent atmosphere, which are called Hermite non-uniformly correlated (HNUC) beams. The results show that the beams not o…