Self-trapping of optical beams in a self-written channel in a solid bulk photopolymer material

Li, Haoyu; Qi, Yue; Malallah, Ra’ed; Ryle, James P.; Sheridan, John T.

doi:10.1117/12.2085769

Cited by 3 publications

(8 citation statements)

References 13 publications

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“…When the balance of divergence and focusing effects occurs, the longitudinal gradient of laser intensity reduces, and then the distribution of the longitudinal gradient force also reduces, that has been shown in works [3,8,12,23].Moreover, the spatial optical soliton appears and propagates continuously.Our result in Fig. 3 is similar to that obtained by Li [13]for the self-trapping of optical beam in the self-written optical waveguide in a solid photopolymer material. a b Fig.…”

Section:  supporting

confidence: 89%

“…The Gaussian laser beam propagating through GRIN medium will be self-focused [11], and then self-trapped in the small trapping cylinder [12]. This phenomenonis similar to that the laser beam propagating through a self-written optical waveguide in a solid photopolymer material volume [13],Alkalineearth atoms [14], and thermophoresis [15]. Specially, the self-trapping has been experimentally observed in the human red blood cellssuspension by the propagation of laser beam, seen as nonlinear medium [16].Lamhot and his co-workers also investigated the optical soliton beam in nanoparticle suspension by virtue of thermophoresis [15].In this paper, we propose the model of optical tweezers by using the thicknonlinear particle solution.…”

Section: Introductionmentioning

confidence: 76%

“…of RLGB are simultaneously occurred by the beam waist's decrease. If both processes are in balance, thespatial optical soliton will appear [13,15,17], meansthat the RLGB will be self-trapped in the center of the trapped region.…”

Section: Principle Model For Simulationmentioning

confidence: 99%

See 2 more Smart Citations

Laser Self-Trapping in Optical Tweezers for Nonlinear Particles

Ho¹,

Doan²,

Bui³

et al. 2021

Preprint

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The optical tweezers are used to trap the particles embedded in a suitable fluid. The optical trap efficiency is significantly enhanced for nonlinear particleswhich response to the Kerr effect. The optical transverse gradient force makes these particles’ mass density in trapping region increasing, and the Kerr medium can be created. When the laser Gaussian beam propagates through it, the self-focusing, and consequentlyself-trappingcan appear. In this paper, a model describing the laser self-trapping in nonlinear particle solution of optical tweezers is proposed. The expressions for the Kerr effect, effective refractive index of nonlinear particle solution and the intensity distribution of reshaped Gaussian laser beam are derived, and the self-trapping of laser beam is numerically investigated. Finally, the guide properties of nonlinear particles-filled trapping region and guiding condition are analysed and discussed.

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Section:  supporting

confidence: 89%

Section: Introductionmentioning

confidence: 76%

See 1 more Smart Citation

Laser Self-Trapping in Optical Tweezers for Nonlinear Particles

Ho¹,

Doan²,

Bui³

et al. 2021

Preprint

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show abstract

“…The coefficient A is set to 1.2 × 10 −3 . 6 In model 2, the simulation starts with photomonomer mixture of 40% monomer, 57% polymer, and 3% photoinitiator. The percentages for components are fixed to make sure that the maximum change in refractive index of the mixture is the same as in model 1 after complete conversion of the monomers to polymer chains.…”

Section: Numerical Parametersmentioning

confidence: 99%

“…A single optical channel results within the material mixture by illumination with one Gaussian laser beam and it is referred to as straight SWW. 5,6 When two Gaussian beams with offset or misalignment along the transverse x -direction are propagated into the material mixture from opposite directions, the two optical channels are selfbent to compensate the misalignment and merge to create a single channel. Such resulting channels are referred as bent SWWs.…”

Section: Introductionmentioning

confidence: 99%

Simulation of straight and bent self-written waveguides in photopolymer mixture using phenomenological and diffusion models

Suar

Rahlves

Reithmeier

et al. 2018

Optical Design and Engineering VII

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Straight and bent self-written waveguides (SWWs) are formed within a photomonomer mixture by means of a self-trapping effect when a single laser beam or two laser beams with tilt are propagated inside. These SWWs can be used as optical interconnects in integrated photonic circuits if two laser beams are launched in opposite directions into the photomonomer. In this work, two kinds of photo-polymerization models are implemented to simulate the SWWs. In the phenomenological model, the refractive index increases directly with actinic laser intensity, whereas the diffusion model has a more complex variation of refractive index profile which takes into account the individual redistribution of mixture components. Both these models are linked with a Crank-Nicholson based Beam Propagation Method (CN-BPM) to simulate the time varying light distribution within the polymer coupling structures. Differences are observed in the numerical simulation results for straight and bent SWWs with respect to the temporal evolution of refractive index within the mixture, corresponding beam intensity profiles and curing time. In addition, we show that a saturation of refractive index change leads to the polymerization of surrounding monomer and, as consequence, to corrupted light guiding. We report on the minimum refractive index modulation that is required for optimal light guiding within the SWW.

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A model of Gaussian laser beam self-trapping in optical tweezers for nonlinear particles

et al. 2021

View full text Add to dashboard Cite

The optical tweezers are used to trap the particles embedded in a suitable fluid. The optical trap efficiency is significantly enhanced for nonlinear particles which response to the Kerr effect. The optical transverse gradient force makes these particles' mass density in trapping region increasing, and the Kerr medium can be created. When the laser Gaussian beam propagates through it, the self-focusing, and consequently self-trapping can appear. In this paper, a model describing the laser self-trapping in nonlinear particle solution of optical tweezers is proposed. The expressions for the Kerr effect, effective refractive index of nonlinear particle solution and the intensity distribution of reshaped Gaussian laser beam are derived, and the self-trapping of laser beam is numerically investigated. Finally, the guide properties of nonlinear particles-filled trapping region and guiding condition are analysed and discussed.

show abstract

Self-trapping of optical beams in a self-written channel in a solid bulk photopolymer material

Cited by 3 publications

References 13 publications

Laser Self-Trapping in Optical Tweezers for Nonlinear Particles

Laser Self-Trapping in Optical Tweezers for Nonlinear Particles

Simulation of straight and bent self-written waveguides in photopolymer mixture using phenomenological and diffusion models

A model of Gaussian laser beam self-trapping in optical tweezers for nonlinear particles

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