Enhanced optical magnetism for reversed optical binding forces between silicon nanoparticles in the visible region

Yano, Taka-aki; Tsuchimoto, Yuta; Zaccaria, Remo Proietti; Toma, Andréa; Portela, Alejandro; Hara, Masahiko

doi:10.1364/oe.25.000431

Cited by 17 publications

(11 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Analogous phenomena were found in Au nanorod heterodimers [19]. Further numerical results showed that the TOBF for a silicon dimer changes from an attractive force to a repulsive one with variation of wavelength [20]. The repulsive force originates from the hybridization between the broad electric dipole and narrow magnetic dipole in the particles.…”

Section: Introductionsupporting

confidence: 54%

Transverse optical binding for a dual dipolar dielectric nanoparticle dimer

et al. 2021

View full text Add to dashboard Cite

The physical origins of the transverse optical binding force and torque beyond the Rayleigh approximation have not been clearly expressed to date. Here, we present analytical expressions of the force and torque for a dual dipolar dielectric dimer illuminated by a plane wave propagating perpendicularly to the dimer axis. Using this analytical model, we explore the roles of the hybridized electric dipolar, magnetic dipolar, and electric-magnetic dipolar coupling interactions in the total force and torque on the particles. We find significant departures from the predictions of the Rayleigh approximation, particularly for high-refractive-index particles, where the force is governed by the magnetic interaction. This results in an enhancement of the dimer stability by one to four orders of magnitude compared to the predictions of the Rayleigh approximation. For the case of torque, this is dominated by the coupling interaction and increases by an order of magnitude. Our results will help to guide future experimental work in optical binding of high-refractive-index dielectric particles.

show abstract

Section: Introductionsupporting

confidence: 54%

Transverse optical binding for a dual dipolar dielectric nanoparticle dimer

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The potential to exploit these properties has made optical trapping and manipulation of HID nanoparticles an interesting line of research. Examples include optical sorting [20], optical binding forces [21] and recent experimental demonstrations [22].…”

Section: Introductionmentioning

confidence: 99%

Directional scattering and multipolar contributions to optical forces on silicon nanoparticles in focused laser beams

Länk¹,

Johansson²,

Käll³

2018

Opt. Express

View full text Add to dashboard Cite

Nanoparticles made of high index dielectric materials have seen a surge of interest and have been proposed for various applications, such as metalenses, light harvesting and directional scattering. With the advent of fabrication techniques enabling colloidal suspensions, the prospects of optical manipulation of such nanoparticles becomes paramount. High index nanoparticles support electric and magnetic multipolar responses in the visible regime and interference between such modes can give rise to highly directional scattering, in particular a cancellation of back-scattered radiation at the first Kerker condition. Here we present a study of the optical forces on silicon nanoparticles in the visible and near infrared calculated using the transfer matrix method. The zero-backscattering Kerker condition is investigated as an avenue to reduce radiation pressure in an optical trap. We find that while asymmetric scattering does reduce the radiation pressure, the main determining factor of trap stability is the increased particle response near the geometric resonances. The trap stability for non-spherical silicon nanoparticles is also investigated and we find that ellipsoidal deformation of spheres enables trapping of slightly larger particles.

show abstract

“…These conclusions are based on an analogy of the Maxwell's equations with the quantum mechanics, in particular with molecular orbitals. Later these disclosures we reported for coupled photonic crystal slabs [17], two planar dielectric photonic metamaterials [18], two silicon spheres [19,20] and two coaxial disks [21]. Similarly for the case of dielectric sphere with large refractive index at perfectly conducting surface the high-Q Mie resonant modes transform into the bonding TM type or anti-bonding TE type modes which give rise to attractive or repulsive resonant forces because of boundary conditions.…”

Section: Introductionmentioning

confidence: 90%

Resonant binding of dielectric particles to metal surface without plasmonics

Bulgakov,

Picgugin,

Sadreev

2021

Preprint

View full text Add to dashboard Cite

Enhanced optical magnetism for reversed optical binding forces between silicon nanoparticles in the visible region

Cited by 17 publications

References 24 publications

Transverse optical binding for a dual dipolar dielectric nanoparticle dimer

Transverse optical binding for a dual dipolar dielectric nanoparticle dimer

Directional scattering and multipolar contributions to optical forces on silicon nanoparticles in focused laser beams

Resonant binding of dielectric particles to metal surface without plasmonics

Contact Info

Product

Resources

About