Reactive optical matter: light-induced motility in electrodynamically asymmetric nanoscale scatterers

Yifat, Yuval; Coursault, Delphine; Peterson, Curtis W.; Parker, J. A.; Bao, Ying; Gray, Stephen K.; Rice, Stuart A.; Scherer, Norbert F.

doi:10.1038/s41377-018-0105-y

Cited by 36 publications

(36 citation statements)

References 33 publications

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confidence: 91%

“…In one-to-one correspondence, we show that the particle-wave association in the droplet-bath system with an integrated pilot-wave field becomes reminiscent of the wave-matter interaction in optical systems and the chasing droplet pairs counterpart optical heterodimers−two optically bound particles of unequal size [29,30]. In optical systems, the spatial inter-particle distance and the motion trajectory of the heterodimers are confined by optical binding and optical trap, respectively [29]. Correspondingly, in the droplet-bath system, the particlewave association between the droplets and their local wave field provides the inter-droplet binding whereas the global wave field acts as multilevel hydrodynamic traps which lead to orbital motion.…”

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confidence: 94%

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Quantized orbital-chasing liquid metal heterodimers directed by an integrated pilot-wave field

Tang,

Zhao,

Liu

2020

Preprint

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A millimetric bouncing droplet sustained on a vibrating bath becomes a moving wave source (particle) through periodically interacting with the local wave field it generates during droplet-bath impact. By virtue of such particle-wave duality, the macroscopic hydrodynamic system imitates enigmatic behaviors of the quantum realm. Here we show experimentally that it is possible to create an integrated pilot-wave field to better prescribe the droplet trajectories, via amplified bath capillarity. This is demonstrated with a liquid metal droplet-bath system in which the local wave field generated by droplet bouncing is superposed by a global wave field induced by bath meniscus oscillation. The resulted dual pilot-wave configuration enables a class of directional chasing motions of two bound dissimilar droplets (heterodimers) in multilevel hydrodynamic traps (orbits) featuring two quantized regime parameters, namely the inter-droplet binding distance and the orbit radius. The peculiar features of the integrated pilot-wave field as well as the droplet-wave interactions therein are discussed. It is revealed that a temporal bouncing phase shift between the two droplets due to size mismatch gives rise to their horizontal propulsion while their spatial binding regime exclusively determines the collective chasing direction. It is also evidenced that the horizontal inorbit chasing motion is directly related to vertical droplet bouncing. The findings unveil integrated pilot-wave field as a trail towards improved droplet guiding, thereby extending the hydrodynamic particle-wave analogy to optical systems and beyond.

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confidence: 91%

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confidence: 94%

Quantized orbital-chasing liquid metal heterodimers directed by an integrated pilot-wave field

Tang,

Zhao,

Liu

2020

Preprint

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“…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][20][21] These systems are of particular interest in optical physics due to their manifestation of non-reciprocal forces, collective (correlated) interactions and many-body effects in their electrodynamic interactions [22][23][24][25][26] and can also serve as useful mesoscale analogs with which to study atomic-level chemical processes. 27 It is known that long range interactions manifest structural and dynamic correlations in driven dense colloidal solutions due to hydrodynamic interactions, 28 and in quantumdot perturbed molten salt solutions.…”

Section: Introductionmentioning

confidence: 99%

Data-Driven Reaction Coordinate Discovery in Overdamped and non-Conservative Systems: Application to Optical Matter Structural Isomerization

Chen

Peterson

Parker

et al. 2020

Preprint

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Powerful technique as it is to study the collective fluctuations and structural transitions in under-damped conservative systems, normal mode analysis cannot be applied to the optical matter (OM) system, an overdamped system subject to non-conservative forces, which consists of (nano-)particle constituents in solution that can self-organize into ordered arrays bound by electrodynamic interactions. We propose a data-driven approach based on principal component analysis (PCA) of deviations from a reference structure to determine the soft 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, which is demonstrated for structural isomerization of a six-particle OM system. The reaction coordinate we discover is in accord with committor analysis and the identified mechanism is in agreement with experiment. The PCA-HLDA approach to data-driven discovery of reaction coordinates aids in the understanding of non-conservative and overdamped systems.

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“…10,11 Experimental verification of this effect has been published recently. 12 In a separate line of research, metamaterial surfaces have also been shown to experience optical forces, and there are indications that the periodic nature of the substrate may enhance the optical forces that are generated. 13,14 Patterned two-dimensional surfaces, both metallic and dielectric, may be fabricated using a range of different lithographic techniques, and could form the basis of optically controlled sensors and actuators.…”

Section: Introductionmentioning

confidence: 99%

Optical forces on patterned particles

O'Donnell¹,

Hanna²

2019

Complex Light and Optical Forces XIII

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The non-conservative nature of optical forces has been explored previously, with the initial focus on spherical particles, and latterly on particles with less than spherical symmetry. Non-conservative optical forces occur in many different guises, and include lateral forces arising from shape asymmetry, polarisation dependant optical torques and spin-dependant lateral forces. Photo-induced curing of liquid crystalline polymers is a technique that may be used to generate refractive-index patterning of surfaces. Here, we use computational methods to examine the influence of such surface structuring on optically-generated forces and torques, with a view to optimising such materials for applications as light-driven sensors and actuators.

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Reactive optical matter: light-induced motility in electrodynamically asymmetric nanoscale scatterers

Cited by 36 publications

References 33 publications

Quantized orbital-chasing liquid metal heterodimers directed by an integrated pilot-wave field

Quantized orbital-chasing liquid metal heterodimers directed by an integrated pilot-wave field

Data-Driven Reaction Coordinate Discovery in Overdamped and non-Conservative Systems: Application to Optical Matter Structural Isomerization

Optical forces on patterned particles

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