Results 21 to 30 of about 2,984 (218)
Results in Physics, 2021 We propose an ultra-compact plasmonic nanostructure to realize multiple Fano resonance (FR) modes, comprising two separated metal–insulator-metal (MIM) bus waveguides side-coupled with a circular ring, including an air path, and this design is less ...
Chung-Ting Chou Chao +2 more
doaj +1 more source
Novel double-band input coupler for gyroklystron and gyro-TWT
AIP Advances, 2021 A novel input coupler that can operate in two different frequency bands separately is proposed in this paper. The dual-band (X/Ku) signals are input by two rectangular waveguides, respectively, in particular, a Bragg reflector is inserted in one of the ...
Xiaoyan Wang +3 more
doaj +1 more source
The Design of Large Curved Waveguide Based on Sunflower Graded Photonic Crystal
Photonics, 2023 In this paper, three large curved waveguides based on Sunflower Graded photonic crystal are designed. Numerical simulations of electromagnetic beam bending in Sunflower Graded photonic crystals have shown that homogenization based on the Maxwell–Garnett ...
Wei Liu +3 more
doaj +1 more source
Hollow Waveguide Arrays as Quarter- and Half-Wave Plates
IEEE Photonics Journal, 2022 We present hollow waveguide arrays acting like quarter- and half-wave plates. Approximately 2000 × 2500 individual rectangular hollow waveguides filled with air and surrounded by a gold cladding form the basis of the wave plates.
Stefan Belle +2 more
doaj +1 more source
PTFE-Based Circular Terahertz Dielectric Waveguides
PhotonicsThis paper presents the transmission characteristics of flexible solid circular dielectric waveguides in the terahertz frequency band. In this paper, we measured the electrical properties of certain polymers within 325–500 GHz.
Hao Li, Dehai Zhang, Haotian Zhu
doaj +1 more source
Topological sensing with photonic arrays of resonant circular waveguides
Physical Review Research, 2021 We propose a photonic array of resonant circular dielectric waveguides with subwavelength grating that can be designed as a robust and sensitive topological chemical sensor. The device can detect trace amounts of a given chemical species through photonic
Kiernan E. Arledge +3 more
doaj +1 more source
Modulational instability of coupled ring waveguides with linear gain and nonlinear loss
Scientific Reports, 2017 We consider a nanostructure of two coupled ring waveguides with constant linear gain and nonlinear absorption - the system that can be implemented in various settings including polariton condensates, optical waveguides or atomic Bose-Einstein condensates.
Nguyen Viet Hung +4 more
doaj +1 more source
Magnetooptics in Cylindrical Structures
Applied Sciences, 2018 Understanding magnetooptics in cylindrical structures presents interest in the development of magnetic sensor and nonreciprocal devices compatible with optical fibers.
Štefan Višňovský
doaj +1 more source
Twin Crystal Moiré Metasurfaces for Crossing Flat‐Band Transport
Advanced Functional Materials, EarlyView.This study introduces twin crystal moiré metasurfaces, breaking in‐plane symmetry to enable reconfigurable acoustic wave manipulation. By adjusting the twin angle and interlayer twist angle, various combinations of hyperbolic, flat bands, and elliptic states can be synthesized in the system.
Shida Fan +9 more
wiley +1 more source
Advances in Sustainable and Wearable Textile Based Soft Robotics
Advanced Functional Materials, EarlyView.This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas +6 more
wiley +1 more source