Efficient and robust artificial nanomotors could provide a variety of exciting possibilities for applications in physics, biology chemistry, including nanoelectromechanical systems, biochemical sensing, drug delivery. However, the application current man-made is limited by their sophisticated fabrication techniques, low mechanical output power severe environmental requirements, making performance far below that natural biomotors. Here we show single-crystal gold nanorods can be rotated...

Plasmonic antennas are well-known and extremely powerful platforms for optical spectroscopy, sensing, manipulation of molecules nanoparticles. However, resistive antenna losses, resulting in highly localized photothermal heat generation, may significantly compromise their applicability. Here we investigate how the interplay between plasmon-enhanced thermal forces affects dynamics nanocolloids diffusing close proximity to gold bowtie nanoantennas. The study is based on an anti-Stokes...

Hybrid components combining the optical power of a refractive and diffractive system can form compact doublet lenses that correct various aberrations. Unfortunately, diffraction efficiency these devices decreases as function deflection angle over element aperture. Here, we address this issue, compensating for chromatic dispersion correcting monochromatic aberrations with centimeter-scale hybrid-metalenses. We demonstrate correction at least 80% aberration 70% spherical aberration. finally...

This paper introduces a procedure aimed to quantitatively measure the optical properties of nanoparticles, namely complex polarizability and extinction, scattering, absorption cross sections, simultaneously. The method is based on processing intensity wavefront images light beam illuminating nanoparticle interest. Intensity measurements are carried out using quadriwave lateral shearing interferometry, quantitative phase imaging technique with high spatial resolution sensitivity. does not...

An optical metasurface consists of a dense and usually nonuniform layer scattering nanostructures behaving as continuous extremely thin component with predefined phase, transmission reflection profiles. To date, various sorts metasurfaces (metallic, dielectric, Huygens-like, Pancharatman-Berry, etc.) have been introduced to design ultrathin lenses, beam deflectors, holograms, or polarizing interfaces. Their actual efficiencies depend on the ability predict their properties fabricate...

Gold nanorods can be optically trapped in aqueous solution and forced to rotate at kilohertz rates by circularly polarized laser light.This enables detailed investigations of local environmental parameters processes, such as medium viscosity nanoparticle-molecule reactions.Future applications may include nanoactuation single-cell analysis.However, the influence photothermal heating on nanoparticle dynamics needs better understood order realize widespread quantitative use.Here we analyze hot...

Plasmonic gold nanorods are prime candidates for a variety of biomedical, spectroscopy, data storage, and sensing applications. It was recently shown that optically trapped by focused circularly polarized laser beam can function as extremely efficient nanoscopic rotary motors. The system holds promise applications ranging from nanofluidic flow control nanorobotics to biomolecular actuation analysis. However, fully exploit this potential, one needs be able understand heating effects...

Phase-gradient metasurfaces have the potential to revolutionize photonics by offering ultrathin alternatives a wide range of common optical elements, including bulky refractive optics, waveplates, and axicons. However, fabrication state-of-the-art typically involves several expensive, time-consuming, potentially hazardous processing steps. To address this limitation, facile methodology construct phase-gradient from an exposed standard electron beam resist is developed. The method...

The Ising model was introduced in 1920 to describe a uniaxial system of magnetic moments, localized on lattice, interacting via nearest-neighbour exchange interaction. It is the generic for continuous phase transition and arguably most studied theoretical physics. Since it solved two-dimensional lattice by Onsager 1944, thereby representing one very few exactly solvable models dimensions higher than one, has served as testing ground new developments analytic treatment numerical algorithms....

Abstract High index dielectric nanoparticles and metasurfaces have been proposed for many different applications, including light harvesting, sensing, metalenses. However, widespread utilization in practice also requires large‐scale fabrication methods able to produce homogeneous structures with engineered optical properties a cost effective manner. Here, facile method silicon is presented that scalable 4 inch wafers can wide range of nanoparticle shapes on demand. Furthermore, it shown the...

Gold nanoparticles offer a unique possibility for contact-free bioanalysis and actuation with high spatial resolution that increases their potential bioapplications such as affinity-based biosensing, drug delivery, cancer treatment. Here we demonstrate an ultrasensitive optomechanical method probing releasing DNA cargo from individual gold trapped manipulated by laser tweezers. Single nanorods are operated rotational nanomotors, driven controlled circularly polarized light in aqueous...

Thermo-optically generated bubbles in water provide a powerful means for active matter control microfluidic environments. These are often formed via continuous-wave illumination of an absorbing medium resulting bubble nucleation vaporization and subsequent growth from the inward diffusion gas molecules. However, to date, such tend be several microns diameter, slow dissipation. This limits dynamic rate, spatial precision, throughput operation any application. Here we show that isolated...

The challenge of inducing and controlling localized fluid flows for generic force actuation achieving efficient mass transport in microfluidics is key to the development next generation miniaturized systems chemistry life sciences. Here we demonstrate a methodology robust precise quantification extremely strong flow transients driven by vapor bubble nucleation on spatially isolated plasmonic nanoantennas excited light. system capable producing peak speeds order mm/s at modulation rates up...

We describe here a focal plane array of Cold-Electron Bolometer (CEB) detectors integrated in Frequency Selective Surface (FSS) for the 350 GHz detection band OLIMPO balloon-borne telescope. In our architecture, two terminal CEB has been periodic unit cell FSS structure and is impedance matched to embedding seen by it provides resonant interaction with incident sub-mm radiation. The detector designed operate background noise limited condition powers 20 pW 80 pW, making possible use same...

Particles that diffuse in close proximity to a surface are expected behave differently than free solution because the interaction will influence number of physical properties, including hydrodynamic, optical, and thermal characteristics particle. Understanding such effects is particularly important view increasing interest laser tweezing colloidal resonant nanoparticles for applications as nanomotors optical printing investigations unconventional forces. Therefore, we used total internal...

Brownian microparticles diffusing in optical potential-energy landscapes constitute a generic test bed for nonequilibrium statistical thermodynamics and have been used to emulate wide variety of physical systems, ranging from Josephson junctions Carnot engines. Here we demonstrate that it is possible scale down this approach nanometric length scales by constructing tilted washboard potential the rotation plasmonic gold nanorods. The depth tilt can be precisely adjusted modulating light...

An improved method for obtaining the Ising partition function of n x square grids with periodic boundary is presented. Our applies results from Galois theory in order to split computation into smaller parts and at same time avoid use numerics. Using this we have computed exact (320 320) grid, ( 256 ) 160 as well a number grids. We obtain scaling parameters compare what prescribes.

Metasurfaces enable us to control the fundamental properties of light with unprecedented flexibility.However, most metasurfaces realized date aim at modifying plane waves.While manipulation nonplanar wavefronts is encountered in a diverse number applications, their using still its infancy.Here we design metareflector able reflect diverging Gaussian beam back onto itself efficiency over 90% and focusing an arbitrary distance.We outline clear route towards complex metareflectors that can find...

Abstract Laser tweezing of optically resonant nanostructures, such as plasmonic nanoparticles and high‐index dielectric nanoresonators, is extremely challenging because the enhanced light–matter interaction usually amplifies radiation pressure to an extent where conventional single beam gradient trapping in three dimensions becomes impossible. Such particles are therefore typically trapped off resonance or two only. To extend application potential optical tweezers case, focus splitting...

The possibility to generate and measure rotation torque at the nanoscale is of fundamental interest study application biological artificial nanomotors may provide new routes towards single cell analysis, studies non-equilibrium thermodynamics, mechanical actuation systems. A facile way drive use focused circularly polarized laser light in optical tweezers. Using this approach, metallic nanoparticles can be operated as highly efficient scattering-driven rotary motors spinning unprecedented...