Replication data for : Metasurface supporting quasi-BIC for optical trapping and Raman-spectroscopy of biological nanoparticles (doi:10.18710/VW1M5L)

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Replication data for : Metasurface supporting quasi-BIC for optical trapping and Raman-spectroscopy of biological nanoparticles

doi:10.18710/VW1M5L

DataverseNO

2023-01-20

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Hasan, Md Rabiul; Hellesø, Olav Gaute, 2023, "Replication data for : Metasurface supporting quasi-BIC for optical trapping and Raman-spectroscopy of biological nanoparticles", https://doi.org/10.18710/VW1M5L, DataverseNO, V1

Replication data for : Metasurface supporting quasi-BIC for optical trapping and Raman-spectroscopy of biological nanoparticles

doi:10.18710/VW1M5L

Hasan, Md Rabiul (UiT The Arctic University of Norway)

Hellesø, Olav Gaute (UiT The Arctic University of Norway)

UiT The Arctic University of Norway

2023-01-20

COMSOL Multiphysics

Matlab

302333

DataverseNO

UiT The Arctic University of Norway

Hellesø, Olav Gaute

Hasan, Md Rabiul

2023-01-19

https://doi.org/10.18710/VW1M5L

Physics, Finite element method, Bound-states-in-the-continuum, Optical trapping, Raman enhancement

Optical trapping combined with Raman spectroscopy have opened new possibilities for analyzing biological nanoparticles. Conventional optical tweezers have proven successful for trapping of a single or a few particles. However, the method is slow and cannot be used for the smallest particles. Thus, it is not adapted to analyze a large number of nanoparticles, which is necessary to get statistically valid data. Here, we propose quasi-bound states in the continuum (quasi-BICs) in a silicon nitride (Si3N4) metasurface to trap smaller particles and many simultaneously. We use COMSOL Multiphysics version 6.0 for modelling and optimization of the proposed metasurface. The quasi-BIC metasurface contains multiple zones with high field-enhancement (‘hotspots’) at a wavelength of 785 nm, where a single nanoparticle can be trapped at each hotspot. We numerically investigate the optical trapping of a type of biological nanoparticles, namely extracellular vesicles (EVs), and study how their presence influences the resonance behavior of the quasi-BIC. It is found that perturbation theory and a semi-analytical expression gives good estimates for the resonance wavelength and minimum of the potential well, as function of the particle radius. This wavelength is slightly shifted relative to the resonance of the metasurface without trapped particles. The simulations show that the Q-factor can be increased by using a thin metasurface. The thickness of the layer and the asymmetry of the unit cell can thus be used to get a high Q-factor. Our findings show the tight fabrication tolerances necessary to make the metasurface. If these can be overcome, the proposed metasurface can be used for a lab-on-a-chip for mass-analysis of biological nanoparticles.

2021-06-01-2022-10-21

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S. Yang, C. Hong, Y. Jiang, and J. C. Ndukaife, "Nanoparticle Trapping in a Quasi-BIC System," ACS Photonics 8(7), 1961-1971 (2021).

10.1021/acsphotonics.0c01941

S. Yang, C. Hong, Y. Jiang, and J. C. Ndukaife, "Nanoparticle Trapping in a Quasi-BIC System," ACS Photonics 8(7), 1961-1971 (2021).

K. Koshelev, S. Lepeshov, M. Liu, A. Bogdanov, and Y. Kivshar, "Asymmetric Metasurfaces with High-Q Resonances Governed by Bound States in the Continuum," Phys. Rev. Lett. 121(19), 193903 (2018)

10.1103/PhysRevLett.121.193903

K. Koshelev, S. Lepeshov, M. Liu, A. Bogdanov, and Y. Kivshar, "Asymmetric Metasurfaces with High-Q Resonances Governed by Bound States in the Continuum," Phys. Rev. Lett. 121(19), 193903 (2018)

L. Neumeier, R. Quidant, and D. E. Chang, "Self-induced back-action optical trapping in nanophotonic systems," New J. Phys. 17(1), 123008 (2015).

10.1088/1367-2630/17/12/123008

L. Neumeier, R. Quidant, and D. E. Chang, "Self-induced back-action optical trapping in nanophotonic systems," New J. Phys. 17(1), 123008 (2015).

G. Q. Moretti, A. Tittl, E. Cortés, S. A. Maier, A. V. Bragas, and G. Grinblat, "Introducing a Symmetry‐Breaking Coupler into a Dielectric Metasurface Enables Robust High‐Q Quasi‐BICs," Adv. Photonics Res. 3(12), 2200111 (2022).

10.1002/adpr.202200111

G. Q. Moretti, A. Tittl, E. Cortés, S. A. Maier, A. V. Bragas, and G. Grinblat, "Introducing a Symmetry‐Breaking Coupler into a Dielectric Metasurface Enables Robust High‐Q Quasi‐BICs," Adv. Photonics Res. 3(12), 2200111 (2022).

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Reflectance spectrum

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Raman enhancement factor

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Sensitivity of scaling factor

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Sensitivity of height

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Perturbation theory

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Reflectance spectrum for particle sizes

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Trapping potential vs. wavelength shift

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Trap depth vs. particle radii

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