All-dielectric metasurfaces enabled by quasi-BIC for high-Q near-perfect light absorption DOI

Zhisen Huang,

Jin Wang, Wei Jia

et al.

Optics Letters, Journal Year: 2024, Volume and Issue: 50(1), P. 105 - 105

Published: Nov. 15, 2024

All-dielectric metasurface (ADM) absorbers driven by quasi-bound states in the continuum (BIC) are critical for high-performance optoelectronic devices due to their ability offer high Q -factor absorption. However, these all-dielectric metasurfaces usually require aid of degenerate coupling schemes or back-metal reflective layers achieve absorption, which often suffers from limitations such as sensitive geometrical parameters, ohmic losses, and low -factors. This work presents an ADM high- near-perfect light consists double Si nanorods SiO 2 /Ta O 5 multilayers. By breaking symmetry length nanorods, this can excite a single quasi-BIC resonance corresponding electric dipole. Without introducing metal layer, we realize highly asymmetric only 6 films. It is theoretically numerically demonstrated that has more than 98% absorption at 943.68 nm 2842. In addition, exhibits excellent tolerance parameters while ensuring performance. Our results provide new ideas design perfect with large tolerances -factors also open up possibilities optical filtering, sensing, photon detection devices.

Language: Английский

Laser trapping and manipulation of micro/nano-objects on polymer substrates DOI Open Access
Yue Yin,

D. L. Lin,

SHEN Tian-Ci

et al.

Acta Physica Sinica, Journal Year: 2025, Volume and Issue: 74(8), P. 0 - 0

Published: Jan. 1, 2025

Polymer substrates overcome the limitations of rigid planar in spatial deformation scenarios and can be combined with photolithography to fabricate complex, three-dimensional irregular polymer structures. Photothermal-shock tweezer is a laser trapping technique based on photothermal shock effect. leverages pulsed induced transient generate micro-newton-scale thermomechanical strain gradients force, enabling capture manipulation micro/nano-objects at solid interfaces. Integrating this address demands new application scenarios.In work, we use commonly employed polymethyl methacrylate (PMMA) negative photoresist (SU-8) as substrates, which SiO<sub>2</sub> nanofilms are fabricated using sol-gel method. This approach effectively mitigates thermal damage caused by effects, micro/nano-objects.<br>SiO<sub>2</sub> nanofilms, characterized low conductivity, inhibit heat transfer. The nanofilm fabrication utilized study enables synthesis large-area coverage, surface roughness (R<sub>q</sub> ~ 320 pm) uniform thickness, making it broadly applicable flexible Direct contact between layer during tweezers induce irreversible substrate degradation due effects. Experimental results demonstrate that depositing an thicker than 110 nm significantly enhances insulation protection, mitigating laser-induced under typical optical conditions.<br>Additionally, analyzing temperature field distribution gold nanosheet, PMMA substrate, single found reduce least 111 ºC delay time for reach its peak 13.2 ns compared nanosheet. experimental expand environmental media objects, offering possibilities applications micro/nano-manipulation, micro/nanorobotics, micro/nano-optoelectronic devices.

Language: Английский

Citations

0
Ultra-narrowband dielectric metasurfaces for surface-enhanced infrared absorption DOI
Haining Chong, Wenkang Zhang,

Yuanhao Mu

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(9)

Published: March 1, 2025

Quasi-bound states in the continuum (QBICs) mid-infrared region have been widely explored to enhance light–matter interactions for biochemical sensing. However, their steep dispersion bands often limit Q-factor stability under focused light. Here, we design and experimentally demonstrate a super QBIC within flatband by introducing lateral geometric perturbations square lattice of etched holes high-index Ge films, enabling strong coupling between energy bands. The achieves theoretical two orders magnitude higher than conventional QBICs, with nearly zero group velocity, supports ultra-narrowband resonances slow light effect. Experimentally, report robust ∼270 at tilted angle, full width half maximum ∼22 nm, field enhancement ∼23 accessible optical cavities. Vibrational is achieved mode C=O vibrational polymethylmethacrylate molecules, Rabi splitting 24.2 cm−1 detuning. Differential transmission spectra reveal fivefold molecular absorption due localization. These results potential metasurfaces advancing surface-enhanced infrared micrometer scale.

Language: Английский

Citations

0
Chip-scale metaphotonic singularities: topological, dynamical, and practical aspects DOI Creative Commons
Tianyue Li, Mengjiao Liu,

Jiahao Hou

et al.

Chip, Journal Year: 2024, Volume and Issue: unknown, P. 100109 - 100109

Published: Sept. 1, 2024

Language: Английский

Citations

3
All-dielectric metasurfaces enabled by quasi-BIC for high-Q near-perfect light absorption DOI

Zhisen Huang,

Jin Wang, Wei Jia

et al.

Optics Letters, Journal Year: 2024, Volume and Issue: 50(1), P. 105 - 105

Published: Nov. 15, 2024

All-dielectric metasurface (ADM) absorbers driven by quasi-bound states in the continuum (BIC) are critical for high-performance optoelectronic devices due to their ability offer high Q -factor absorption. However, these all-dielectric metasurfaces usually require aid of degenerate coupling schemes or back-metal reflective layers achieve absorption, which often suffers from limitations such as sensitive geometrical parameters, ohmic losses, and low -factors. This work presents an ADM high- near-perfect light consists double Si nanorods SiO 2 /Ta O 5 multilayers. By breaking symmetry length nanorods, this can excite a single quasi-BIC resonance corresponding electric dipole. Without introducing metal layer, we realize highly asymmetric only 6 films. It is theoretically numerically demonstrated that has more than 98% absorption at 943.68 nm 2842. In addition, exhibits excellent tolerance parameters while ensuring performance. Our results provide new ideas design perfect with large tolerances -factors also open up possibilities optical filtering, sensing, photon detection devices.

Language: Английский

Citations

1