Optical phenomena in mesoscale dielectric particles

Minin, Oleg V.; Minin, Igor V.

doi:10.20944/preprints202112.0195.v1

“…The larger angle α of the photonic hook (Fig. 3a) is due to the optical vortex near the shadow surface of the particle [22]. Based on the aforementioned theory, the factors of asymmetrically longitudinal triangle guidance and transverse oscillation along ALI both work in the formation mechanism of the proposed photonic hook, and their individual effects are controlled by the thickness of the water film.…”

Section: Characterisation By Poynting Vector Flowsmentioning

confidence: 86%

“…The proposed setup innovatively uses a liquid film (water) and its ALI to accomplish the photonic hook forming. This original idea was offered by Minins and inspired by their publication in 2021 [22]. A long dielectric micro-cylinder or an analogue of an optical fibre core is partially immersed at the edge of a thin water film in this design.…”

Section: Introductionmentioning

confidence: 99%

Semi-immersive photonic hook and optical trapping along an air-liquid interface

Yue¹,

Yan²,

Wang³

et al. 2023

Preprint

0

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In this paper, we demonstrate a novel semi-immersive photonic hook, which is a bent light focus by a dielectric micro-cylinder partially immersed at the edge of a thin liquid film. It only propagates along the air-liquid interface (ALI) and possesses a formation mechanism without material processing for micro-particle and modulation of light irradiation. The existence of ALI at the shadow end of the micro-cylinder and contrasts of refractive indexes over there cause this phenomenon at the specific depths of liquid films. Compared to the previously discovered photonic hooks, its unique setup can generate an optical force field in the ALI region to realise optical trapping for applications in microfluidics, micro/nano-engineering, and biomedical research. The morphology of this photonic hook and its optical trapping forces to micro-object varying locations were analysed to study the formation and feasibility of optical trapping along ALI in this approach.

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“…These results are also important in understanding and explaining the super-resolution phenomena in mesoscale spherebased techniques and microscopy. Moreover, the giant field enhancement will find interesting applications in superenhanced Raman scattering [37], refractive index sensors of surrounding medium and sphere, similar to WGM [38][39][40] but with more high sensitivities, extreme and non-linear optics [13,27] and others. These effects also can be extended to the acoustic [41].…”

Section: Discussionmentioning

confidence: 99%

“…The main expressions of Mie formulas allow to analytically compute both the internal and scattering fields associated to the different magnetic and electric multipolar modes supported by the particle [13]. All the results were obtained directly from analytical calculations, which reveals new physics previously unseen [13][14][15]27]. In our research, as a surrounding medium, we use an air.…”

Section: Super-resolution In Hot Spotmentioning

confidence: 99%

Influence of the environment on the effect of super resonance in mesoscale dielectric spheres

Minin

¹

,

Song

²

2023

Nanophotonics, Micro/Nano Optics, and Plasmonics VIII

1

0

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Dielectric mesoscale spheres have aroused strong interest because of their potential to localize light at deep subwavelength volume and to yield extremal internal magnetic and/or electric field enhancements. Recently, it was showed that such particle could support high-order Mie resonance modes with giant field localization and enhancement. Optimizing the internal fields appears as a key challenge for enhancing wave matter interactions in dielectric mesoscale particles. However, a dielectric particle is always located in some medium, and not in a vacuum. Moreover, the question is how much the environment medium affects the internal field intensities enhancement in the super-resonance effect. Based on Mie theory we show for the first time that the presence of the environment leads to a significant decrease in the intensity of the field in the particle. Thus, the study of the effect of super-resonance becomes meaningless without taking into account the environment. However, a greater enhancement of the internal field is found for the blue-shifted Mie size parameter of the sphere when the particle, for example, is in air rather than in vacuum.

show abstract

“…The proposed setup innovatively uses a liquid film (water) and its ALI to accomplish the photonic hook forming. This original idea was offered by Minins and inspired by their publication in 2021 [22]. A long dielectric micro-cylinder or an analogue of an optical fibre core is partially immersed at the edge of a thin water film in this design.…”

Section: Introductionmentioning

confidence: 99%

Semi-immersive photonic hook and optical trapping along an air-liquid interface

Yue¹,

Yan²,

Wang³

et al. 2023

Preprint

0

View full text Add to dashboard Cite

In this paper, we demonstrate a novel semi-immersive photonic hook, which is a bent light focus by a dielectric micro-cylinder partially immersed at the edge of a thin liquid film. It only propagates along the air-liquid interface (ALI) and possesses a formation mechanism without material processing for micro-particle and modulation of light irradiation. The existence of ALI at the shadow end of the micro-cylinder and contrasts of refractive indexes over there cause this phenomenon at the specific depths of liquid films. Compared to the previously discovered photonic hooks, its unique setup can generate an optical force field in the ALI region to realise optical trapping for applications in microfluidics, micro/nano-engineering, and biomedical research. The morphology of this photonic hook and its optical trapping forces to micro-object varying locations were analysed to study the formation and feasibility of optical trapping along ALI in this approach.

show abstract

Optical phenomena in mesoscale dielectric particles

Cited by 14 publications

References 140 publications

Semi-immersive photonic hook and optical trapping along an air-liquid interface

Semi-immersive photonic hook and optical trapping along an air-liquid interface

Influence of the environment on the effect of super resonance in mesoscale dielectric spheres

Semi-immersive photonic hook and optical trapping along an air-liquid interface

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