Optical forces on Mie particles in an Airy evanescent field

Yang, Yang; Zang, Wei-Ping; Zhao, Zhi-Yu; Tian, Jianguo

doi:10.1364/oe.20.025681

Cited by 22 publications

(15 citation statements)

References 27 publications

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“…If the imaginary part increases further, (e.g. for nickel, n 3 = 1.5 + 3.1i), the oscillations would disappear by strong absorptions [22]. With a transmitted distance of d = 2.1a shown in Fig.…”

Section: Resultsmentioning

confidence: 97%

“…A. V. Novitsky et al analyzed the dynamics of nonparaxial Airy beams which show the role of evanescent waves [21]. And we have investigated the optical forces exerted on a Mie particle in the Airy evanescent field theoretically [22]. Here, we present a systematic study on the MDRs of the optical forces for a particle illuminated by an Airy beam passes through the interface with respect to the electric field distribution inside the particle which reflects the motions of the internal wave.…”

Section: Introductionmentioning

confidence: 95%

“…The integration is over the domain of22 1 The electromagnetic fields E and H can be derived through the Maxwell equations in the Gaussian system of units:…”

mentioning

confidence: 99%

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Morphology-dependent resonance of the optical forces on Mie particles in an Airy beam

Yang¹,

Zang²,

Zhao³

et al. 2013

Opt. Express

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Morphology-dependent resonance (MDR) of the optical forces for a particle illuminated by Airy beams is investigated with respect to its internal field distribution. We find the ring structures arising from the resonance transform significantly with the parametric evolution of Airy evanescent wave, and the interference of the internal waves have a great impact on the Q factor and the background of the resonant peak, but it's not proper for Airy transmitted wave. The multiple reflections of the evanescent wave between the particle and the interface are also investigated, which show significant impacts on the region where the energy concentrate in.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 95%

See 1 more Smart Citation

Morphology-dependent resonance of the optical forces on Mie particles in an Airy beam

Yang¹,

Zang²,

Zhao³

et al. 2013

Opt. Express

Self Cite

View full text Add to dashboard Cite

show abstract

“…Meanwhile, bottle beams [12] and elegant Hermitecosine-Gaussian beams [13] could be used to simultaneously trap two types of particles with refraction index higher or lower than the ambient. In addition, the trapping characteristics of other beams, such as radially polarized beams [14][15][16], vortex beams [17,18], Airy beams [19][20][21], and coherent and partially coherent beams [22][23][24], have also been explored. In all the studies, it is found that the radiation forces are closely related to the initial beam characteristics, such as the coherence, polarization, and spatial profile.…”

Section: Introductionmentioning

confidence: 99%

Optical trapping Rayleigh particles by using focused multi-Gaussian Schell-model beams

Liu

Zhao

2014

Appl. Opt.

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We numerically investigate the radiation forces of multi-Gaussian Schell-model (MGSM) beams, in which the degree of coherence is modeled by the multi-Gaussian function, exerted on the Rayleigh dielectric sphere. By simulation of the forces calculation it is found that the steepness of the edge of the intensity profile (i.e., the summation index M) and the initial coherence width of the MGSM beams play important roles in the trapping range and stability. We can increase the trapping range at the focal plane by increasing the value of M or decreasing the initial coherence of the MGSM beams. It is also found that the trapping stability becomes lower due to the increase of the value of M or the decrease of coherence. Furthermore, the trapping stability under different conditions is explicitly analyzed. The results presented here are helpful for some possible applications.

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“…Despite this, little quantitative study has been done on the dynamics of optically driven particles near a surface. In studies introducing new schemes to optically manipulate matter, the particle's response function is often ignored (11,12,(26)(27)(28)(29).…”

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confidence: 99%

Elliptical orbits of microspheres in an evanescent field

Liu

Kheifets

Ginis

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

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We examine the motion of periodically driven and optically tweezed microspheres in fluid and find a rich variety of dynamic regimes. We demonstrate, in experiment and in theory, that mean particle motion in 2D is rarely parallel to the direction of the applied force and can even exhibit elliptical orbits with nonzero orbital angular momentum. The behavior is unique in that it depends neither on the nature of the microparticles nor that of the excitation; rather, angular momentum is introduced by the particle's interaction with the anisotropic fluid and optical trap environment. Overall, we find this motion to be highly tunable and predictable.optical forces | colloids | microparticles | evanescent field | elliptical motion R ecently, much work has gone into the investigation of optical forces on micro-and nanoparticles near surfaces, primarily in the context of an electric field localized by a microstructured surface (1-5).Surface-based geometries have raised theoretical excitement due to, for instance, their ability to significantly enhance optical forces (6-8) as well as the emergence of lateral forces due to the extraordinary momentum and spin in evanescent waves (9)(10)(11)(12). From an applied point of view, such geometries can enable miniaturization and parallelization of efficient optical traps enabling integration into optofluidic devices (13,14). Moreover, light-controlled microspheres near surfaces have found applications as force transducers (15-18) and pumps and switches (19,20), and in general, their collective manipulation is an advancing field (21-23).However, in the case where a microparticle is within several diameters of a surface, optical and hydrodynamic surface effects cannot be neglected. Effects arising from optical coupling or reflections can complicate trapping and detection schemes (24), and hydrodynamic interactions can cause the motion of a microparticle to become highly nontrivial (25). Despite this, little quantitative study has been done on the dynamics of optically driven particles near a surface. In studies introducing new schemes to optically manipulate matter, the particle's response function is often ignored (11,12,(26)(27)(28)(29).In this work, we investigate the dynamics of a system with both near field optical forces and surface-induced hydrodynamic effects (see Fig. 1). By driving the particle with an oscillating force from a modulated evanescent field and tracking the particle's motion closely in two dimensions, we map out a range of dynamics that can arise from the interplay of optical and hydrodynamic surface effects. We find that the magnitude and direction of the optical force depends on particle size. We also observe that the trajectory of the particle in general does not follow the direction of the force. Instead, the shape and the orientation of the trajectory vary with modulation frequency and distance of the particle from the surface, a result of the anisotropy in both the hydrodynamic drag and the optical trap spring constant.In particular, we find that under ce...

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Optical forces on Mie particles in an Airy evanescent field

Cited by 22 publications

References 27 publications

Morphology-dependent resonance of the optical forces on Mie particles in an Airy beam

Morphology-dependent resonance of the optical forces on Mie particles in an Airy beam

Optical trapping Rayleigh particles by using focused multi-Gaussian Schell-model beams

Elliptical orbits of microspheres in an evanescent field

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