A5100621231- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Photonic Crystals and Applications
- Metamaterials and Metasurfaces Applications
- Plasmonic and Surface Plasmon Research
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- ECG Monitoring and Analysis
- Advanced Antenna and Metasurface Technologies
- Optical Coatings and Gratings
- Advanced Photonic Communication Systems
- Atrial Fibrillation Management and Outcomes
- EEG and Brain-Computer Interfaces
- Antenna Design and Analysis
- Analytical Chemistry and Sensors
- Solid State Laser Technologies
- Photorefractive and Nonlinear Optics
- Photonic Crystal and Fiber Optics
- Acute Myocardial Infarction Research
- Orbital Angular Momentum in Optics
- Thyroid Cancer Diagnosis and Treatment
- Gene expression and cancer classification
- Bioinformatics and Genomic Networks
- Advanced Sensor and Control Systems
- Microwave Engineering and Waveguides
Tiangong University
2016-2025
Shaoxing University
2023-2024
Dalian Maritime University
2024
Gansu Agricultural University
2023-2024
First Affiliated Hospital of Zhengzhou University
2012-2024
Qilu University of Technology
2024
Shandong Academy of Sciences
2024
Hunan University
2015-2023
China Three Gorges University
2023
Lanzhou Institute of Husbandry and Pharmaceutical Sciences
2022-2023
We report the realization of a coherent perfect absorber, using pair passive resonators coupled to microwave transmission line in background, which can completely absorb light its parity-time (PT-)symmetric phase but not broken phase. Instead balancing material gain and loss, we exploit incident waves open system as an effective so that ideal PT symmetry be established by only materials. Such route will construct PT-symmetric metamaterials also tunable optical elements general. It provides...
Abstract 2D optics is gradually emerging as a frontier in modern optics. Plasmons graphene provide prominent platform for which the light squeezed into atomic scale. This report highlights some recent progresses plasmons toward The launch, observation, and advanced manipulation of propagating optical circuits are described. Representative achievements associated with metasurfaces, challenges, like photoexcited transformation linking to bulk singularity investigated.
Feature extraction and classification of electrocardiogram (ECG) signals are necessary for the automatic diagnosis cardiac diseases. In this study, a novel method based on genetic algorithm-back propagation neural network (GA-BPNN) classifying ECG with feature using wavelet packet decomposition (WPD) is proposed. WPD combined statistical utilized to extract effective features signals. The coefficients calculated as sets. GA employed decrease dimensions sets optimize weights biases back...
We show theoretically that a one-dimensional photonic crystal containing negative-index material has an omnidirectional gap, owing to the mechanism of zero (volume) averaged refractive index. In contrast Bragg edge such zero-n̄ gap is insensitive incident angle and polarization. When impurity introduced, defect mode appears inside with very weak dependence on invariant scaling.
The transmission properties of a one-dimensional photonic crystal containing two kinds single-negative (permittivity- or permeability-negative) media are studied theoretically. We show that this structure can possess type gap with zero effective phase (phi(eff) ). zero-phi(eff) distinguishes itself from Bragg in it is invariant change scale length and insensitive to thickness fluctuation. In contrast corresponding averaged refractive index, the be made very wide by varying ratio thicknesses...
We propose an ultra-thin planar metasurface with phase discontinuities for highly efficient beam steering. The effect benefits from the broadband transparency and flexible modulation of stacked metal/dielectric multi-layers that is perforated coaxial annular apertures. Proof-of-principle experiments verify efficiency 65% a deflection angle 18° at 10 GHz are achieved transmitted beam, which also in good agreement finite-difference-method-in-time-domain (FDTD) simulations. scheme shall be...
Goos–Hänchen (G–H) effect is of great interest in the manipulation optical beams. However, it still fairly challenging to attain efficient controls G–H shift for diverse applications. Here, a mechanism realize tunable terahertz regime with electrically controllable graphene proposed. Taking monolayer covered epsilon‐near‐zero metamaterial as planar model system, found that shifts orthogonal s‐polarized and p‐polarized beams at oblique incidence are positive negative, respectively. The can be...
The application of three-dimensional (3D) plasmonic nanostructures as metamaterials (MMs), nano-antennas, and other devices faces challenges in producing metallic with easily definable orientations, sophisticated shapes, smooth surfaces that are operational the optical regime beyond. Here, we demonstrate complex 3D can be readily achieved focused-ion-beam irradiation-induced folding examine characteristics "nanograter" structures composed free-standing Au films. These exhibit interesting...
Measuring body temperature is considerably important to physiological studies as well clinical investigations. In recent years, numerous observations have been reported and various methods of measurement employed. The present paper introduces a novel wearable sensor in intelligent clothing for human measurement. objective the integration optical fiber Bragg grating (FBG)-based sensors into functional textiles extend capabilities solutions monitoring. addition, sensitivity 150 pm/°C, which...
Thermomechanical damage of nodules in dielectric multilayer coatings that are irradiated by nanosecond laser pulses has been interpreted with respect to mechanical properties and electric-field enhancement. However, the effect enhancement nodular damage, especially influence distributions, never directly demonstrated through experimental results, which prevents achievement a clear understanding process defects. Here, systematic comparative study was designed reveal how distributions affect...
Automatic recognition of arrhythmias is particularly important in the diagnosis heart diseases. This study presents an electrocardiogram (ECG) system based on multi-domain feature extraction to classify ECG beats. An improved wavelet threshold method for signal pre-processing applied remove noise interference. A novel proposed; this employs kernel-independent component analysis nonlinear and uses discrete transform extract frequency domain features. The proposed utilises a support vector...
The phenomenon of electromagnetically induced transparency (EIT) is demonstrated in a surface plasmon polariton waveguide at infrared frequencies. comb line slot and rectangle cavity are placed inside one the metallic claddings, their coupling intensities among them utilized to obtain bright dark states. destructive interference between states leads an EIT-like transmission spectrum waveguide. peak can be manipulated by adjusting distance Finally, influence Joule loss on effect investigated....
Here, we present a mechanism for tailoring the photonic band structure of quarter-wave stack without changing its physical periods by embedding conductive sheets. Graphene is utilized and studied as realistic, two-dimensional sheet. In graphene-embedded stack, synergic actions Bragg scattering graphene conductance contributions open gaps at center reduced Brillouin zone, that nonexistent in conventional stacks. Such show giant, loss-independent density optical states fixed lower-gap-edges,...
Optical Tamm states, a kind of interface modes, are also called plasmon-polaritons. They experimentally observed in photonic heterostructures based on microstrip transmission lines. The position optical states can be designed exactly under effective impedance match and phase shift conditions. Our results show that the band gaps have effect negative-permittivity or negative-permeability media constructing modes. simulations experimental agree with each other quite well.
Abstract Since the performance of electronic circuits is becoming rather limited in face intensively increasing amount information and related operations, all‐optical processing offers a promising strategy for future system. It would benefit great deal if could be implemented within developed chips nanoscale structures. In that it highly desirable to break diffraction limit light achieving effective manipulations with deep subwavelength structures compatible state‐of‐the‐art nanofabrication...