The real-time and label-free terahertz (THz) metamaterial (MM) sensor is proposed to distinguish the normal concentration of glucose from abnormal based on THz time-domain spectroscopy (TDS) technology. physical mechanism biosensing performance verified theoretically experimentally. designed composed a couple asymmetric thick metals silicon dioxide substrate exhibits two transmission dips at 0.26 0.4 in region 0.1 0.5 THz, respectively. Four samples with concentrations 4 mmol/L 10 step 2 are...

In this article, we experimentally demonstrate a bifunctional terahertz (THz) metasurface that can achieve broadband linear-to-circular polarization conversion (LCPC) and linear (LPC) in two different bands, respectively. The measured 3-dB axial ratio relative bandwidth is 34.2% for the LCPC lower band from 0.34 to 0.48 THz, over 80% LPC higher 0.53 0.85 THz. physical mechanism of explained by surface current distribution further discussed employing multiple interference model. This THz...

We proposed a multifunctional terahertz metasurface based on double L-shaped pattern and vanadium dioxide (VO2) film separated by polyimide. When the VO2 is an insulator, dual-band electromagnetically induced transparency effect obtained, physical mechanism investigated current distribution "two-particle" model. metal, linear-to-circular polarization converter, in which y-polarized linear wave can be effectively converted to left-handed circularly polarized (LCP) right-handed simultaneously...

The reported dual-band asymmetric transmission is usually an effect of mutual polarization conversion, where one polarized wave converted to its cross-polarization in the first band while other second band. In this work, we experimentally demonstrate a only for one-polarized linear terahertz It measured that coefficient T yx reaches two peaks 0.715 and 0.548 at frequency 0.74 THz 1.22 THz, respectively. While xy lower than 0.2 wide-band from 0.5 1.5 THz. Firstly, multiple interference model...

In this work, a broadband terahertz asymmetric transmission metamaterial is experimentally demonstrated for linearly polarized wave. The measured coefficient T yx larger than 0.6 from 0.55 to 0.82 THz, and reaches peak value of 0.714 at 0.62 while the xy lower 0.2 0.4 0.9 THz. calculated parameter measurement ranges 0.53 0.84 THz magnitudes over 0.4. reached 0.65 frequency 0.78 physical mechanism polarization conversion was also analyzed distributions surface currents electric fields.

A double-layer broadband high-transmission terahertz linear-to-circular polarization metasurface is experimentally demonstrated in frequencies between 0.46 and 0.62 THz. The measured results show a good agreement with the simulations. values of co-polarization transmission coefficients Txx Tyy remain above 0.82 both simulation experiment, simulated axial ratio 26.2% 29.6%, respectively. Moreover, experimental ellipticity remains 0.98 region from 0.5 to average conversion 0.68....

Imidacloprid has been widely used in crop pest control and disease resistance, the highly sensitive detection of imidacloprid concentration is strongly demanded field food safety other fields. In this paper, a method to determine by using tablet instead liquid on terahertz metamaterial sensor proposed, which could avoid influence water absorption band. The physical mechanism biosensing performance verified theoretically experimentally. It found that resonant frequency red shift as increases....

The spin-selective absorption (SSA) usually means absorbing one spin state of a circular polarized (CP) wave while reflecting the orthogonal one. Here, we propose two types (type 1 and type 2) dual-band SSA with strong dichroism based on chiral metasurface operating at terahertz region. For proposed metasurface, can absorb same CP in adjacent bands, 2 first band second band. physical mechanism is discussed by introducing multiple interference model detailed equation derivation process....

A multi-functional terahertz metamaterial with electromagnetically induced transparency (EIT) and broadband absorptions is proposed. The unit cell of the comprised an E shape a split-ring resonator on top polyimide. For TE TM polarization, temporal coupled-mode theory reveals that EIT effect arises from coupling two resonators. transparent windows are experimentally demonstrated at 0.205 THz 0.44 for respectively. When vanadium dioxide ([Formula: see text] film added to bottom polyimide...

Atomic layer deposited (ALD) ultra-thin alumina film is proposed to control the operational lifetimes of fully biodegradable (FB-) surface sensitive acoustic wave (SAW) devices. SAW devices encapsulated with conventional thick organic materials fail function effectively, while an encapsulation (AEL) normally high performance. After being subjected degradation in water, a FB-SAW device no AEL starts degrade immediately and fails within 8 h, due dissolution tungsten electrode piezoelectric...

Clifford circuits can be utilized to disentangle quantum state with polynomial cost, thanks the Gottesman-Knill theorem. Based on this idea, Circuits Augmented Matrix Product States (CAMPS) method, which is a seamless integration of within DMRG algorithm, was proposed recently and shown able reduce entanglement in various systems. In work, we further explore power CAMPS method critical spin chains described by conformal field theories (CFTs) scaling limit. We find that variationally...

In recent years, in order to save line corridors and reduce the scope of demolition, some new transmission modes for high voltage AC DC power are proposed. According characteristics parallel line, this paper studies distribution electric field intensity multi circuit lines single line. Comparing analysing simulation results strength, safety measures live working ±800kV with is put forward. That protective equipment used work UHDC can meet requirements operation multi-circuit

Abstract The wind deflection angle is directly related to the electric gap and construction cost of transmission line, so accuracy calculation method reasonable value relevant parameters are very important for safe operation economic rationality line. Because not considering effect speed fluctuation thunderstorm impact other adverse weather conditions, deviation often unsafe. In this paper, multi variable harmonic superposition used establish transient field model under strong blast temporal...

We propose a chiral metasurface with high circular dichroism to detect the polarization (CD) and biological macromolecules. The unit of is three layers consisting F-shaped metal structure, dielectric substrate back ground. proposed can realize strong CD 0.82, which has potential applications in detection

This study examines the interaction between random waves and an oyster reef, both in its plain state when enhanced with energy dissipating macro-roughness. The investigation was carried out using wave flume experiments, incorporating different water levels flow conditions. primary focus of revolves around two key parameters: freeboard steepness. Additionally, explores influence macro-roughness arrangement on transmission coefficient. Empirical relationships were established to determine...

In recent years, in order to save line corridors and reduce the scope of demolition, some new transmission modes for high voltage AC DC power are proposed. According characteristics parallel line, this paper studies distribution electric field intensity multi circuit lines single line. Comparing analysing simulation results strength, safety measures live working 1000kV with is put forward. That protective equipment used work UHV can meet requirements operation double

The vertical-cavity surface-emitting laser, or VCSELs, are widely used in various laser products, including computer mice, printers, and fiber optic communications. In this paper, an enhanced small signal equivalent circuit model is proposed, method of which capable describing the relationship between VCSEL's transmission bandwidth temperature as well bias current. This can be to evaluate failure state VCSEL. our model, parameters were calculated using Levenberg-Marquardt algorithm. We...

Imidacloprid has been widely used in crop pest control and disease resistance. The detection of imidacloprid concentration is extremely important food safety. We proposed a method to determine the by using tablet instead liquid real-time non-labels rapid based on metamaterial (MM). physical mechanism MM effect as well biosensing performance are verified. Results show that can be identified transmission spectroscopy combined with cell. would have applications safety industry.

Van der Waals heterostructures based on the two-dimensional (2D) semiconductor materials have attracted increasing attention due to their attractive properties. In this work, we demonstrate a high-sensitive back-gated phototransistor vertical HfSe 2 /MoS heterostructure with broad-spectral response from near-ultraviolet near-infrared and an efficient gate tunability for photoresponse. Under bias, exhibits high responsivity of up 1.42×10 3 A/W, ultrahigh specific detectivity 1.39×10 15 cm⋅Hz...

Abstract: A multi-functional metamaterial incorporating electromagnetically induced transparency (EIT) and broadband absorptions is proposed in this work. The unit cell of the comprised an E shape a split-ring resonator on top substrate. temporal coupled-mode theory reveals that EIT effect arises from coupling two resonators for different polarizations. tunable transparent windows are experimentally demonstrated at 0.205 THz 0.44 TM TE polarization, respectively. When vanadium dioxide (VO2)...