Optical binding of nanoparticles

One of the key frameworks for developing the theory of light-matter interactions in modern optics and photonics is quantum electrodynamics (QED). Contrasting with semiclassical theory, which depicts electromagnetic radiation as a classical wave, QED representations of quantized light fully embrace the concept of the photon. This tutorial review is a broad guide to cutting-edge applications of QED, providing an outline of its underlying foundation and an examination of its role in photon science. Alongside the full quantum methods, it is shown how significant distinctions can be drawn when compared to semiclassical approaches. Clear advantages in outcome arise in the predictive capacity and physical insights afforded by QED methods, which favors its adoption over other formulations of radiation-matter interaction.

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“…A review on the latest research on such binding forces at the nanoscale is to be found in Ref. [122].…”

Section: B Optical Bindingmentioning

confidence: 99%

Quantum electrodynamics in modern optics and photonics: tutorial

et al. 2020

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“…This is particularly clear when the constituents are NPs that are smaller than the wavelength of light 15 , 16 . This interaction, known as optical binding 14 , 17 , 18 , allows formation of regular OM configurations (e.g. 2D arrays with trigonal symmetry or anisotropic arrays with rectangular lattice configurations) with minimal optical information, generally only the overall shape, polarization, phase, and power of the optical beam 17 and the resulting particle configurations are readily visualized by optical microscopy 15 , 19 – 21 .…”

Section: Introductionmentioning

confidence: 99%

“…It is known that long range interactions manifest structural and dynamic correlations in driven dense colloidal solutions due to hydrodynamic interactions 28 , and in quantum-dot perturbed molten salt solutions 29 . OM configurations self-organize in optical traps in solution and achieve new collective properties due to their electrodynamic interactions and long range (periodic) potentials 14 , 15 , 17 , 18 . The long range interactions create a new richness for understanding isomerizations of OM configurations as they affect the energetics globally and imbue OM systems with many-body interactions and physics.…”

Section: Introductionmentioning

confidence: 99%

Data-driven reaction coordinate discovery in overdamped and non-conservative systems: application to optical matter structural isomerization

et al. 2021

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Optical matter (OM) systems consist of (nano-)particle constituents in solution that can self-organize into ordered arrays that are bound by electrodynamic interactions. They also manifest non-conservative forces, and the motions of the nano-particles are overdamped; i.e., they exhibit diffusive trajectories. We propose a data-driven approach based on principal components analysis (PCA) to determine the collective modes of non-conservative overdamped systems, such as OM structures, and harmonic linear discriminant analysis (HLDA) of time trajectories to estimate the reaction coordinate for structural transitions. We demonstrate the approach via electrodynamics-Langevin dynamics simulations of six electrodynamically-bound nanoparticles in an incident laser beam. The reaction coordinate we discover is in excellent accord with a rigorous committor analysis, and the identified mechanism for structural isomerization is in very good agreement with the experimental observations. The PCA-HLDA approach to data-driven discovery of reaction coordinates can aid in understanding and eventually controlling non-conservative and overdamped systems including optical and active matter systems.

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“…More generally, while a pair of scatterers tends to self-organize at a distance equal to an integer number of optical wavelengths, larger systems suffer from diffraction effects which alter this spacing, but also the system stability [15]. Finally, despite the fact that the binding force scales poorly with decreasing scatterer size [16], OB has recently attracted a lot of attention for nanoparticles, as it appears as a potential mechanism for self-structuring at the nanoscale [17].…”

Section: Introductionmentioning

confidence: 99%

Cooperative cooling in a one-dimensional chain of optically bound cold atoms

2020

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We discuss theoretically the optical binding of one-dimensional chains of cold atoms shone by a transverse pump, where particles self-organize to a distance close to an optical wavelength. As the number of particles is increased, the trapping potential increases logarithmically as the contributions from all atoms add up constructively. We identify a cooperative cooling mechanism, due to the mutual exchange of photons between atoms, which can beat the spontaneous emission for chains that are long enough. Surprisingly, the cooling is optimal very close to the resonance. This peculiar cooling mechanism thus gives new insights into the cooperative physics of low-dimensional cold atom systems.

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Optical binding of nanoparticles

Cited by 55 publications

References 142 publications

Quantum electrodynamics in modern optics and photonics: tutorial

Quantum electrodynamics in modern optics and photonics: tutorial

Data-driven reaction coordinate discovery in overdamped and non-conservative systems: application to optical matter structural isomerization

Cooperative cooling in a one-dimensional chain of optically bound cold atoms

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