Papers by Andrey Novitsky
arXiv (Cornell University), Sep 23, 2019
Carefully designed nanostructures can inspire new type of optomechanical interactions and allow s... more Carefully designed nanostructures can inspire new type of optomechanical interactions and allow surpassing limitations set by classical diffractive optical elements. Apart from strong near-field localization, nanostructured environment allows controlling scattering channels and might tailor many-body interactions. Here we investigate an effect of optical binding, where several particles demonstrate a collective mechanical behaviour of bunching together in a light field. In contrary to classical binding, where separation distances between particles are diffraction limited, an auxiliary hyperbolic metasurface is shown here to break this barrier by introducing several controllable near-field interaction channels. Strong material dispersion of the hyperbolic metamaterial along with high spatial confinement of optical modes, which it supports, allow achieving superior tuning capabilities and efficient control over binding distances on the nanoscale. In addition, a careful choice of the metamaterial slab's thickness enables decreasing optical binding distances by orders of magnitude compared to free space scenarios due to the multiple reflections of volumetric modes from the substrate. Auxiliary tunable metamaterials, which allow controlling collective optomechanical interactions on the nanoscale, open a venue for new investigations including collective nanofluidic interactions, triggered biochemical reactions and many others.
arXiv (Cornell University), 2009
In this Letter we propose the concept of the evanescent Airy beam. We analyze the structure of th... more In this Letter we propose the concept of the evanescent Airy beam. We analyze the structure of the ideal evanescent Airy beam, which initial profile has the Airy form, while the spectral decomposition consists of only evanescent partial waves. Also, we discuss the refraction of the Airy beam through the interface and investigate the field of the transmitted evanescent Airy beam.
Physical Review Research
Integrated photonics is a remarkable platform for scalable classical and quantum light-based info... more Integrated photonics is a remarkable platform for scalable classical and quantum light-based information processing. However, polarization manipulation on a chip despite of its fundamental significance in information processing remains elusive. Polarization manipulation capabilities have been recently demonstrated in femtosecond laser-inscribed twisted waveguides, although the systematic theoretical description of polarization manipulation has not been established for this architecture. In this paper we develop a rigorous theory of a twisted waveguide unveiling its eigenmodes and transmission matrix in the closed form. Utilizing the developed theory, we demonstrate that twisted waveguides can realize virtually arbitrary polarization transformations while satisfying reasonable design constraints. This fact combined with low cost and ease of prototyping of laser inscribed photonic integrated circuits allows us to suggest twisted waveguide as a robust building block for on-chip polarization-encoded information processing.
Users may download and print one copy of any publication from the public portal for the purpose... more Users may download and print one copy of any publication from the public portal for the purpose of private study or research. You may not further distribute the material or use it for any profit-making activity or commercial gain You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.
arXiv (Cornell University), Dec 27, 2022
Integrated photonics is a remarkable platform for scalable classical and quantum light-based info... more Integrated photonics is a remarkable platform for scalable classical and quantum light-based information processing. However, polarization manipulation on a chip despite of its fundamental significance in information processing remains elusive. Polarization manipulation capabilities have been recently demonstrated in femtosecond laser-inscribed twisted waveguides, although the systematic theoretical description of polarization manipulation has not been established for this architecture. In this work we develop a rigorous theory of a twisted waveguide unveiling its eigenmodes and transmission matrix in the closed form. Utilizing the developed theory, we demonstrate that twisted waveguides can realize virtually arbitrary polarization transformations while satisfying reasonable design constraints. This fact combined with low cost and ease of prototyping of laser inscribed photonic integrated circuits allows us to suggest twisted waveguide as a robust building block for on-chip polarization-encoded information processing.
Terahertz cross-phase modulation of an optical mode
ABSTRACT We discuss an optical scheme which facilitates modulation of an optical waveguide mode b... more ABSTRACT We discuss an optical scheme which facilitates modulation of an optical waveguide mode by metallic-nanoslit-enhanced THz radiation. The waveguide mode acquires an additional phase shift due to THz nonlinearity with fields reachable in experiments.
Vector beams as the superposition of cylindrical partial waves in bianisotropic media
Journal of physics, Oct 4, 2006
... A = i kr eϕ ⊗ eϕ + e × r αIr + e × r εer ⊗ v3 + e × r (u + αer) ⊗ v1 B = e × r εIr + e × r εe... more ... A = i kr eϕ ⊗ eϕ + e × r αIr + e × r εer ⊗ v3 + e × r (u + αer) ⊗ v1 B = e × r εIr + e × r εer ⊗ v4 + e × r (u + αer) ⊗ v2 C = −e × r µIr − e × r ... AV Novitsky and LM Barkovsky ... An arbitrary vector function can be written as the superposition of cylindrical partial waves: ( H⊥(r, ϕ, z) E⊥(r, ϕ, z ...
OSA continuum, Dec 20, 2019
We looked at the typical resolution provided by microspheres in nanoobject imaging. The resolutio... more We looked at the typical resolution provided by microspheres in nanoobject imaging. The resolution was studied with two kinds of materials: high-index barium titanate glass and low-index polystyrene. Spheres of different sizes were taken, and thus we also checked if there is any dependence of the resolution capabilities on their dimensions. We concluded that, although we observed an increase in resolution for some of the spheres, practical considerations and lack of consistency in imaging makes this technique too cumbersome for practical applications.
Nanophotonics, Jun 1, 2014
In this review, we explore recent trends in optical micromanipulation by engineering light-matter... more In this review, we explore recent trends in optical micromanipulation by engineering light-matter interaction and controlling the mechanical effects of optical fields. One central theme is exploring the rich phenomena beyond the now established precision measurements based on trapping micro beads with tightly focused beams. Novel synthesized beams, exploiting the linear and angular momentum of light, open new possibilities in optical trapping and micromanipulation. Similarly, novel structures are promising to enable new optical micromanipulation modalities. Moreover, an overview of the amazing features of the optics of tractor beams and backward-directed energy fluxes will be presented. Recently the so-called effect of negative propagation of the beams (existence of the backward energy fluxes) has been confirmed for X-waves and Airy beams. In the review, we will also discuss the negative pulling force of structured beams and negative energy fluxes in the vicinity of fibers. The effect is achieved due to the interaction of multipoles or, in another interpretation, the momentum conservation. Both backward-directed Poynting vector and backward optical forces are counter-intuitive and give an insight into new physics and technologies. Exploiting the degrees of freedom in synthesizing novel beams and designed microstructures offer attractive prospects for emerging optical manipulation applications.
Physical Review Letters, Nov 10, 2011
Usually a light beam pushes a particle when the photons act upon it. This is due to that the elec... more Usually a light beam pushes a particle when the photons act upon it. This is due to that the electric-dipole particle in the paraxial beam is considered. We investigate the scattering forces in non-paraxial gradientless beams and find that the forces can drag certain particles towards the beam source. The major criterion to be carried out to get the attractive force is the strong nonparaxiality of the light beam. The cone angle denoting the non-paraxiality has been investigated to unveil its importance on achieving dragging force. We hope the attractive forces will be very useful in nanoparticle manipulation.
Optical Isolators on Surface Electromagnetic Waves in PT-Symmetric Gyrotropic Structures. I: Special Cases
Crystallography Reports, Feb 1, 2023
Fabrication activity for nanophotonics (invited)
Fast closed-form calculation of THz field enhancement in a metal nanoslit
Nucleation and Atmospheric Aerosols, 2010
Strong electric field enhancement in a metal nanoslit with THz field illumination is hardly calcu... more Strong electric field enhancement in a metal nanoslit with THz field illumination is hardly calculated using the standard simulation packages. It is explained by the considerable difference of the values of nano sizes of the slit and the wavelength of the incident radiation (up to 10000 times). Therefore, significant computational resources or/and the home-made simulation code is needed. We offer the simple single-parameter model as an alternative to the time consuming calculations. The single parameter can be calculated either from the experimental or simulation data (one reference point is necessary to determine one parameter). Then we can find the field enhancement for different slit geometries and light wavelengths.
Non-paraxial beam to push and pull microparticles
Nucleation and Atmospheric Aerosols, 2011
ABSTRACT We discuss a feasibility of the pulling (backward) force acting on a spherical micropart... more ABSTRACT We discuss a feasibility of the pulling (backward) force acting on a spherical microparticle in a non-paraxial Bessel beam. The effect can be explained by the strong interaction of particle's multipoles or by the conservation of momentum in the system ``photons-particle.'' It is remarkable that the puling force revealed does not require the beam focusing or high-index ambient medium. The necessary condition of arising of the backward force is the strong non-paraxiality of an electromagnetic beam. We expect this phenomenon will open new horizons in optical micromanipulation.
Conversion from surface wave to surface wave on reflection
Journal of Optics, Sep 30, 2010
We discuss the reflection and transmission of an incident surface wave to a pure surface wave sta... more We discuss the reflection and transmission of an incident surface wave to a pure surface wave state at another interface. This is allowed only for special media parameters: at least one of the media must be magnetic. We found such material characteristics that the obliquely incident surface wave can be transmitted without changing its direction (nevertheless the amplitude varies). For other media parameters, only normally incident surface waves can be converted to surface waves. We propose applications of the predicted conversion as a beam splitter and polarization filter for surface waves.
Optics Letters, Sep 1, 2015
We demonstrate that optical Fano resonance can be induced by the anisotropy of a cylinder rather ... more We demonstrate that optical Fano resonance can be induced by the anisotropy of a cylinder rather than frequency selection under the resonant condition. A tiny perturbation in anisotropy can result in a giant switch in the principal optic axis near plasmon resonance. Such anisotropyinduced Fano resonance shows fast reversion between forward and backward scattering at the lowest-energy interference. The near and far fields of the particle change dramatically around Fano resonance. The topology of optical singular points and the trajectory of energy flux distinctly reveal the interaction between the incident wave and the localized surface plasmons, which also determine the far-field scattering pattern. The anisotropy-induced Fano resonance and its high sensitivity open new perspectives on light-matter interactions and promise potential applications in biological sensors, optical switches, and optomechanics.
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Papers by Andrey Novitsky