Theory of optical forces on small particles by multiple plane waves

Mobini, Ehsan; Rahimzadegan, Aso; Rockstuhl, Carsten; Alaee, Rasoul

doi:10.1063/1.5046154

Cited by 11 publications

(11 citation statements)

References 75 publications

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“…ji , where ∂ i/j represent the partial derivatives with respect to i, j = {x, y, z} [23], [31], [32]. Due to the polarization state and direction of propagation of the two waves, we can conclude that the TE wave induces the components p z , m y , Q e,xz and Q m,xy , while the TM wave induces the components p x , m z , Q e,xy and Q m,yz .…”

Section: Multipolar Origin Of the Transverse Forcementioning

confidence: 99%

“…Since the sphere is made out of PEC, it does not absorb the energy of the incident waves. Therefore, the forces acting on the sphere are strictly due to the fields that it scatters [18], [23], [25]. This implies that these forces cannot result from the contribution of individual multipolar components, due to their symmetric radiation pattern, but rather from the superposition of at least two multipolar contributions, as explained in [18], [23], [25].…”

Section: Multipolar Origin Of the Transverse Forcementioning

confidence: 99%

“…Therefore, the forces acting on the sphere are strictly due to the fields that it scatters [18], [23], [25]. This implies that these forces cannot result from the contribution of individual multipolar components, due to their symmetric radiation pattern, but rather from the superposition of at least two multipolar contributions, as explained in [18], [23], [25]. Hence, it follows that the total force acting on the sphere may be written as the sum of these multipolar contributions as [16], [18], [23]…”

Section: Multipolar Origin Of the Transverse Forcementioning

confidence: 99%

See 2 more Smart Citations

Multipolar Origin of the Unexpected Transverse Force Resulting from Two-Wave Interference

Achouri,

Kiselev,

Martin

2020

Preprint

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We propose a theoretical study on the electromagnetic forces resulting from the superposition of a TE and TM plane waves interacting with a sphere. Specifically, we first show that, under such an illumination condition, the sphere is subjected to a force transverse to the propagation direction of the waves. We then analyze the physical origin of this counter-intuitive behavior using a multipolar decomposition of the electromagnetic modes involved in that scattering process. This analysis reveals that interference effects, due to the two-wave illumination, lead to a Kerker-like asymmetric scattering behavior resulting in this peculiar transverse force.

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Section: Multipolar Origin Of the Transverse Forcementioning

confidence: 99%

Section: Multipolar Origin Of the Transverse Forcementioning

confidence: 99%

Section: Multipolar Origin Of the Transverse Forcementioning

confidence: 99%

See 1 more Smart Citation

Multipolar Origin of the Unexpected Transverse Force Resulting from Two-Wave Interference

Achouri,

Kiselev,

Martin

2020

Preprint

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“…A plane wave upon passive slabs and particles is unable to generate optical pulling force [1][2][3][4]. Several architectures have demonstrated to have this optical pulling force by engineering structured beams or gain media embedded [5][6][7][8][9][10][11][12][13][14][15]. In the former case, many efforts have been made on nondiffracting Bessel beam [5,6], tractor beams [7], multiple plane waves interference [8][9][10], solenoid beam [11], and temporal decaying pulse excitation [12].…”

Section: Introductionmentioning

confidence: 99%

“…Several architectures have demonstrated to have this optical pulling force by engineering structured beams or gain media embedded [5][6][7][8][9][10][11][12][13][14][15]. In the former case, many efforts have been made on nondiffracting Bessel beam [5,6], tractor beams [7], multiple plane waves interference [8][9][10], solenoid beam [11], and temporal decaying pulse excitation [12]. For the latter one, optical pulling force exerted on gain slab and particle can emerge in vicinity of Fabry-Perot and Fano resonances, respectively [13,15].…”

Section: Introductionmentioning

confidence: 99%

Optical symmetric pushing, uni-/bi-directional null, and pulling-pushing flipped forces in one dimensional PT-symmetric photonics

Chen¹

2021

Preprint

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We discuss the optical forces exerted on parity-time (PT) symmetric heterostructures under normal incidence of a single and two counter-propagating plane waves. The underlying strategy is through generalized parametric space, stemming from consideration of PT-symmetry condition and Lorentz reciprocity theorem. In such a generalized parametric space, we are able to not only exhaustively indicate various PT phases and extraordinary wave phenomena, but also deduce the directionality and magnitudes of optical forces. We find that when the system is illuminated by a normally incident wave, it can exhibit the symmetric pushing effect in the exact symmetry phase, uni-directional null (UNF) and bi-directional null force (BNF) at the exceptional point (EP), and pulling-pushing flipped forces in the broken symmetry phase, with BNF found at the pushing-pulling turning point. In two counter-propagating plane waves interference, the magnitudes as well as the directionality of resultant optical force can be tuned by relative phase of incident waves. More interestingly, we observe that there has a null force independent of the relative phase occurred in a specific region of broken symmetry phase and exceptional point. In addition, we offer several PTsymmetric heterostructures to support our findings. Our results may be beneficial for applications in PT optomechanics and force rectifiers.

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Plasmomechanical Systems: Principles and Applications

Koya

Cunha

Guerrero-Becerra

et al. 2021

Adv Funct Materials

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Extreme confinement of electromagnetic waves and mechanical displacement fields to nanometer dimensions through plasmonic nanostructures offers unprecedented opportunities for greatly enhanced interaction strength, increased bandwidth, lower power consumption, chip-scale fabrication, and efficient actuation of mechanical systems at the nanoscale. Conversely, coupling mechanical oscillators to plasmonic nanostructures introduces mechanical degrees of freedom to otherwise static plasmonic structures thus giving rise to the generation of extremely large resonance shifts even for minor position changes. This nanoscale marriage of plasmonics and mechanics has led to the emergence of a new field of study called plasmomechanics that explores the fundamental principles underneath the coupling between light and plasmomechanical nanoresonators. In this review, both the fundamental concepts and applications of plasmomechanics as an emerging field of study are discussed. After an overview of the basic principles of plasmomechanics, the active tuning mechanisms of plasmonic nano-mechanical systems are extensively analyzed. Moreover, the recent developments on the practical implications of plasmomechanic systems for such applications as biosensing and infrared detection are highlighted. Finally, an outlook on the implications of the plasmomechanical nanosystems for development of point-of-care diagnostic devices that can help early and rapid detection of fatal diseases are forwarded.

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Theory of optical forces on small particles by multiple plane waves

Cited by 11 publications

References 75 publications

Multipolar Origin of the Unexpected Transverse Force Resulting from Two-Wave Interference

Multipolar Origin of the Unexpected Transverse Force Resulting from Two-Wave Interference

Optical symmetric pushing, uni-/bi-directional null, and pulling-pushing flipped forces in one dimensional PT-symmetric photonics

Plasmomechanical Systems: Principles and Applications

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