可调节的多频段太赫兹传感器基于石墨烯等离子体元表面.
Maira Khafagy1, AbdelRahman M Ghanim1,2, Mohamed A Swillam3
1Department of Physics, School of Science and Engineering, The American University in Cairo, New Cairo, 11835, Egypt.
Scientific reports
|February 11, 2026
概括
一个新的金属-介电-介电-金属元表面使得高灵敏的三频段特拉赫兹折射率传感. 这种基于石墨烯的传感器为生物医学诊断和气体检测中的应用提供了可调节的性能.
科学领域:
- 塑制剂的使用方法
- 在Metasurfaces上使用.
- 太赫兹 (THz) 传感感应
背景情况:
- 传统的等离子传感器通常具有有限的灵敏度或传感频段.
- 太赫兹技术为无标签的生物传感和材料表征提供了独特的特性.
- 将石墨烯集成到超表面中可以提供可调节的电子和光学特性.
研究的目的:
- 引入一种新的金属-介电-介电-金属 (MDDM) 超表面架构,用于在THz区域增强的折射率传感.
- 用基于石墨烯的碎形图案来展示具有高灵敏度的三带传感能力.
- 研究底层的等离子体共振机制及其对传感器性能的影响.
主要方法:
- 多层MDDM结构的制造,包括石墨烯,介电层,基板和.
- 利用强烈的等离子共振和在超表面内的增强吸收.
- 分析三种不同的共振模式 (双极,四极,混合) 的光谱反应,以检测折射率.
主要成果:
- 在三个不同的传感模式中实现了10μm/RIU,3μm/RIU和2.75μm/RIU的高灵敏度.
- 证明了三带传感能力,超过了单带和双带传感器.
- 由于双介电配置和混合共振,观察到增强的电场定位和强烈的电磁"热点".
结论:
- 拟议的MDDM传感器表现出卓越的灵活性和灵活性,用于THz范围内的折射率传感.
- 可调节性和在环境变化下稳定的性能突显了其实际潜力.
- 在无标签的生物医学诊断,气体传感和葡萄糖监测方面的应用具有重大前景.
相关概念视频
Band Theory
17.3K
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
17.3K
Energy Bands in Solids
2.0K
Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
2.0K
Multi-input and Multi-variable systems
428
Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
In the absence of...
In the absence of...
428
Multi-Step Reactions
8.8K
Chemical reactions often occur in a stepwise fashion involving two or more distinct reactions taking place in a sequence. A balanced equation indicates the reacting species and the product species, but it reveals no details about how the reaction occurs at the molecular level. The reaction mechanism (or reaction path) provides details regarding the precise, step-by-step process by which a reaction occurs. Each of the steps in a reaction mechanism is called an elementary reaction. These...
8.8K
Multi-species Conserved Sequences
4.9K
Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
4.9K
Insertion of Multi-pass Transmembrane Proteins in the RER
18.6K
The rough ER membrane synthesizes, assembles, and embeds transmembrane proteins in diverse topologies. These proteins function as transporters or channels and can remain in the ER membrane or are sent to the Golgi complex, lysosome, and cell membrane.
The multipass transmembrane proteins are the type IV integral membrane proteins with multiple topogenic sequences determining their spatial arrangement in the ER membrane. Nearly all multipass proteins lack a cleavable signal sequence and use...
The multipass transmembrane proteins are the type IV integral membrane proteins with multiple topogenic sequences determining their spatial arrangement in the ER membrane. Nearly all multipass proteins lack a cleavable signal sequence and use...
18.6K


