Dual-Wavelength On-Chip Integrated Metalens for Epi-Fluorescence Single-Molecule Sensing DOI Creative Commons
Elena Barulina, Dang Du Nguyen, Fedor A. Shuklin

и другие.

Sensors, Год журнала: 2024, Номер 24(23), С. 7781 - 7781

Опубликована: Дек. 5, 2024

Single-molecule fluorescence spectroscopy offers unique capabilities for the low-concentration sensing and probing of molecular dynmics. However, employing such a methodology versatile diagnostics under point-of-care demands device miniaturization to lab-on-a-chip size. In this study, we numerically design metalenses with high numerical aperture (NA = 1.1), which are composed silicon nitride nanostructures deposited on waveguide can selectively focus guided light into an aqueous solution at two wavelengths interest in spectral range 500-780 nm. Despite severe chromatic focal shift lateral directions owing wavelength-dependent propagation constant waveguide, segmented on-chip provide perfectly overlapping volumes that meet requirements epi-fluorescence collection. We demonstrate molecule detection efficiencies designed excitation emission ATTO 490LS, Alexa 555, APC-Cy7 tandem fluorophores sufficient collect several thousand photons per second modest rate constants. Such sensitivity provides reliable diffusion correlation analysis single molecules chip extract their concentration properties nanomolar range. Achromatic open new avenues developing ultra-compact sensitive devices precision medicine environmental monitoring.

Язык: Английский

Ultrathin broadband terahertz metamaterial based on single-layer nested patterned graphene DOI
Zhipeng Li, Shubo Cheng, Huafeng Zhang

и другие.

Physics Letters A, Год журнала: 2025, Номер unknown, С. 130262 - 130262

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

64

Perfect absorption properties of a near-infrared super-surface perfect absorber based on a multilayer subwavelength array structure DOI
Yujie Wang, Zhimin Liu, Fengqi Zhou

и другие.

Physics Letters A, Год журнала: 2025, Номер unknown, С. 130395 - 130395

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

15

Ultra-broadband Absorber and Near-perfect Thermal Emitter based on Multi-layered Grating Structure Design DOI

Haoran Yuan,

Zhiyou Wang, Tangyou Sun

и другие.

Energy, Год журнала: 2025, Номер unknown, С. 134594 - 134594

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

10

Terahertz bands multifunctional metamaterial transmission-absorption switching device based on vanadium dioxide DOI
Xinmei Wang, Xiaoyong He, Chaojun Tang

и другие.

Dalton Transactions, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

In this paper, a vanadium dioxide (VO2)-based terahertz device is proposed to realize the conversion between broadband absorption and transmission functions, including VO2 bottom layer, dielectric layer pattern in three-layer structure. With change of conductivity, metamaterial can switch transmission. When exhibits transmission, it has high transmittance 90% for waves 5.6 THz 8.7 frequency band. absorption, 3.66 9.98 Furthermore, with increasing peak decreases from 93.8% 0% increases 1% 99.5%. The impedance matching theory invoked physical mechanism elucidated by analyzing surface electric field device. By studying characteristics different incidence polarization angles, insensitive good performance over large angles. Compared other absorbers metamaterials, structure study unique design diverse functions play an important role various fields such as communications, electromagnetic stealth, sensors, thermal emission devices.

Язык: Английский

Процитировано

7

Accurate graphene-based absorber for slight leakage detection of Radon and chloroform air-pollution DOI Creative Commons

Bahareh Khodadadi,

Pejman Rezaei,

Soheil Hadipour

и другие.

Results in Physics, Год журнала: 2025, Номер unknown, С. 108196 - 108196

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

2

Spectral Hadamard microscopy with metasurface-based patterned illumination DOI Creative Commons
Yongjae Jo, Hyemi Park, Seho Lee

и другие.

Nanophotonics, Год журнала: 2025, Номер 14(8), С. 1171 - 1183

Опубликована: Фев. 6, 2025

Abstract Hadamard matrices, composed of mutually orthogonal vectors, are widely used in various applications due to their orthogonality. In optical imaging, microscopy has been applied achieve sectioning by separating scattering and background noise from desired signals. This method involves sequential illumination using patterns subsequent image processing. However, it typically requires costly light modulation devices, such as digital micromirror devices (DMDs) or spatial modulators (SLMs), generate multiple patterns. this study, we present spectral based on a holographic matasurface. We noticed that certain repeat within other under specific condition, allowing the entire set be reproduced single pattern. finding suggests generating pattern is sufficient implement microscopy. To demonstrate this, designed metasurface an conducted imaging simulations. Results showed metasurface-based effectively suppressed signals, resulting clear fluorescent images. Furthermore, demonstrated hyperspectral can achieved with dispersive elements, orthogonality enables resolve information. The reconstructed images displayed color distribution closely matching synthetic ground truth. Our findings suggest accomplished without capability unattainable standard wide-field microscopes. sophisticated metasurfaces have potential replace enhance conventional components, anticipate study will contribute advancements

Язык: Английский

Процитировано

1

Design of a Tunable Metamaterial Absorption Device with an Absorption Band Covering the Mid-Infrared Atmospheric Window DOI Creative Commons
Zhong He, Dong Fang,

Yougen Yi

и другие.

Photonics, Год журнала: 2025, Номер 12(2), С. 148 - 148

Опубликована: Фев. 12, 2025

We propose a highly efficient broadband tunable metamaterial infrared absorption device. The design is modeled using the three-dimensional finite element method for results show that device captures over 90% of light in wavelength range from 6.10 μm to 17.42 μm. utilize VO2’s phase change property adjust device, allowing average level vary between 20.61% and 94.88%. In this study, we analyze electromagnetic field distribution at its peak point find high achieved through both surface plasmon resonance Fabry–Perot cavity resonance. structural parameters are fine-tuned parameter scanning. By comparing our work with previous studies, demonstrate superior performance design. Additionally, investigate polarization angle incident it insensitive these factors. Importantly, simple structure broadens potential uses photodetection, stealth, sensing.

Язык: Английский

Процитировано

1

Thermal management broadband emitting device based on VO2 applied in the mid infrared band DOI
Ying Zheng, Zhiyou Wang, Qianju Song

и другие.

Dalton Transactions, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

This article designs a dynamic thermal emitter based on phase change material VO 2 . structure avoids emission loss at low temperatures and increases heat dissipation high temperatures.

Язык: Английский

Процитировано

0

A five-peaks graphene-based metamaterial terahertz absorber with dynamic tunability for sensing application DOI
Yu Wan, Tangyou Sun, Qianju Song

и другие.

Diamond and Related Materials, Год журнала: 2025, Номер 153, С. 112090 - 112090

Опубликована: Фев. 7, 2025

Язык: Английский

Процитировано

0

Ultra High Efficiency Solar Capture Device Based on InAs Nanoring Microstructure DOI Open Access
Zao Yi,

Xiangchao Yao,

Qianju Song

и другие.

Coatings, Год журнала: 2025, Номер 15(2), С. 243 - 243

Опубликована: Фев. 19, 2025

As a widely used clean energy source, solar has demonstrated significant promise across various applications due to its wide spectral range and efficient absorption performance. This study introduces cross-structured, ultra-broadband absorber utilizing titanium (Ti) dioxide (TiO2) as foundational materials. The exhibits over 90% within the 280–4000 nm wavelength surpasses 95% in broader spectrum from 542 3833 through cavity coupling effect of incident light excitation subsequent initiation surface plasmon resonance mechanism, thus successfully achieving goal broadband high absorption. Through finite difference time domain method (FDTD) simulation, average efficiency reaches 97.38% 280 4000 nm, it is 97.75% nm. At air mass 1.5 (AM 1.5), 97.46%, loss 2.54%, which extremely efficiency. In addition, thanks material considerations, adopts variety high-temperature resistant materials, making thermal radiation environment still good; specifically, at temperature 900 K, can reach 97.27%, extreme 1800 K temperature, maintain 97.52% radiation, further highlighting excellent stability comprehensive structure optical properties, give broad applicability an ideal or emitter. More importantly, insensitive polarization state effectively handle lines wide-angle range. photothermal conversion (Hereafter referred pc efficiency) sustain elevated level under conditions, enables flexibly adapt diverse environmental especially suitable for integration application photovoltaic systems, broaden potential field renewable energy.

Язык: Английский

Процитировано

0