scholarly journals Fano-Resonant Hybrid Metamaterial for Enhanced Nonlinear Tunability and Hysteresis Behavior

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Yuancheng Fan ◽  
Xuan He ◽  
Fuli Zhang ◽  
Weiqi Cai ◽  
Chang Li ◽  
...  
Keyword(s):  
Resonant Mode ◽  
Nonlinear Frequency ◽  
Ceramic Structure ◽  
Practical Applications ◽  
High Q ◽  
Trapped Mode ◽  
Scattering Spectrum ◽  
Frequency Agile ◽  
Nonlinear Modulation ◽  
Hybrid Metamaterial

Artificial resonant metamaterial with subwavelength localized filed is promising for advanced nonlinear photonic applications. In this article, we demonstrate enhanced nonlinear frequency-agile response and hysteresis tunability in a Fano-resonant hybrid metamaterial. A ceramic cuboid is electromagnetically coupled with metal cut-wire structure to excite the high-Q Fano-resonant mode in the dielectric/metal hybrid metamaterial. It is found that the significant nonlinear response of the ceramic cuboid can be employed for realization of tunable metamaterials by exciting its magnetic mode, and the trapped mode with an asymmetric Fano-like resonance is beneficial to achieve notable nonlinear modulation on the scattering spectrum. The nonlinear tunability of both the ceramic structure and the ceramic/metal hybrid metamaterial is promising to extend the operation band of metamaterials, providing possibility in practical applications with enhanced light-matter interactions.

scholarly journals A High Q-Factor Outer-Frame-Anchor Gyroscope Operating at First Resonant Mode

Micromachines ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1071
Author(s):  
Bo Jiang ◽  
Yan Su ◽  
Guowen Liu ◽  
Lemin Zhang ◽  
Fumin Liu
Keyword(s):  
High Performance ◽  
Microelectromechanical Systems ◽  
Resonant Mode ◽  
Low Noise ◽  
Silicon On Insulator ◽  
Q Factor ◽  
Wafer Level ◽  
High Q ◽  
Ring Structures ◽  
Static Performance

Disc gyroscope manufactured through microelectromechanical systems (MEMS) fabrication processes becomes one of the most critical solutions for achieving high performance. Some reported novel disc constructions acquire good performance in bias instability, scale factor nonlinearity, etc. However, antivibration characteristics are also important for the devices, especially in engineering applications. For multi-ring structures with central anchors, the out-of-plane motions are in the first few modes, easily excited within the vibration environment. The paper presents a multi-ring gyro with good dynamic characteristics, operating at the first resonant mode. The design helps obtain better static performance and antivibration characteristics with anchor points outside of the multi-ring resonator. According to harmonic experiments, the nearest interference mode is located at 30,311 Hz, whose frequency difference is 72.8% far away from working modes. The structures were fabricated with silicon on insulator (SOI) processes and wafer-level vacuum packaging, where the asymmetry is 780 ppm as the frequency splits. The gyro also obtains a high Q-factor. The measured value at 0.15 Pa was 162 k, which makes the structure have sizeable mechanical sensitivity and low noise.

scholarly journals Cooling Performance of Arrays of Vibrating Cantilevers

2009 ◽  
Vol 131 (11) ◽  
Author(s):  
Mark Kimber ◽  
Suresh V. Garimella
Keyword(s):  
Heat Transfer ◽  
Thermal Performance ◽  
Vibration Amplitude ◽  
Past Research ◽  
Resonant Mode ◽  
Operating Conditions ◽  
Infrared Thermal Imaging ◽  
Practical Applications ◽  
Wide Range ◽  
Piezoelectric Fans

Piezoelectric fans are vibrating cantilevers actuated by a piezoelectric material and can provide heat transfer enhancement while consuming little power. Past research has focused on feasibility and performance characterization of a single fan, while arrays of such fans, which have important practical applications, have not been widely studied. This paper investigates the heat transfer achieved using arrays of cantilevers vibrating in their first resonant mode. This is accomplished by determining the local convection coefficients due to the two piezoelectric fans mounted near a constant heat flux surface using infrared thermal imaging. The heat transfer performance is quantified over a wide range of operating conditions, including vibration amplitude (7.5–10 mm), distance from heat source (0.01–2 times the fan amplitude), and pitch between fans (0.5–4 times the amplitude). The convection patterns observed are strongly dependent on the fan pitch, with the behavior resembling a single fan for small fan pitch and two isolated fans at a large pitch. The area-averaged thermal performance of the fan array is superior to that of a single fan, and correlations are developed to describe this enhancement in terms of the governing parameters. The best thermal performance is obtained when the fan pitch is 1.5 times its vibration amplitude.

scholarly journals Periodic Tubular Structures and Phononic Crystals towards High-Q Liquid Ultrasonic Inline Sensors for Pipes

Sensors ◽  
2021 ◽  
Vol 21 (17) ◽  
pp. 5982
Author(s):  
Nikolay Mukhin ◽  
Ralf Lucklum
Keyword(s):  
Mode Conversion ◽  
Phononic Crystal ◽  
Resonant Mode ◽  
Phononic Crystals ◽  
Acoustic Energy ◽  
Wave Radiation ◽  
Q Factor ◽  
Tubular Structures ◽  
High Q ◽  
Ultrasound Sensor

The article focuses on a high-resolution ultrasound sensor for real-time monitoring of liquid analytes in cylindrical pipes, tubes, or capillaries. The development of such a sensor faces the challenges of acoustic energy losses, including dissipation at liquid/solid interface and acoustic wave radiation along the pipe. Furthermore, we consider acoustic resonant mode coupling and mode conversion. We show how the concept of phononic crystals can be applied to solve these problems and achieve the maximum theoretically possible Q-factor for resonant ultrasonic sensors. We propose an approach for excitation and measurement of an isolated radial resonant mode with minimal internal losses. The acoustic energy is effectively localized in a narrow probing area due to the introduction of periodically arranged sectioned rings around the tube. We present a sensor design concept, which optimizes the coupling between the tubular resonator and external piezoelectric transducers. We introduce a 2D-phononic crystal in the probing region for this purpose. The Q-factor of the proposed structures show the high prospects for phononic crystal pipe sensors.

scholarly journals Graphene Multiple Fano Resonances Based on Asymmetric Hybrid Metamaterial

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2408
Author(s):  
Zhendong Yan ◽  
Zhixing Zhang ◽  
Wei Du ◽  
Wenjuan Wu ◽  
Taoping Hu ◽  
...  
Keyword(s):  
Structural Parameters ◽  
Resonant Mode ◽  
Split Ring Resonator ◽  
Graphene Nanoribbon ◽  
Fano Resonances ◽  
Dark Mode ◽  
Split Ring ◽  
Tunable Sensors ◽  
Asymmetric Hybrid ◽  
Hybrid Metamaterial

We theoretically investigate multiple Fano resonances in an asymmetric hybrid graphene–metal metamaterial. The multiple Fano resonances emerge from the coupling of the plasmonic narrow bonding and antibonding modes supported by an in-plane graphene nanoribbon dimer with the broad magnetic resonance mode supported by a gold split-ring resonator. It is found that the Fano resonant mode with its corresponding dark mode of the antibonding mode in the in-plane graphene nanoribbon dimer is only achieved by structural symmetry breaking. The multiple Fano resonances can be tailored by tuning the structural parameters and Fermi levels. Active control of the multiple Fano resonances enables the proposed metamaterial to be widely applied in optoelectronic devices such as tunable sensors, switches, and filters.

scholarly journals Frequency-agile THz-wave generation and detection system using nonlinear frequency conversion at room temperature

2010 ◽  
Vol 18 (16) ◽  
pp. 16430 ◽  
Author(s):  
Ruixiang Guo ◽  
Tomofumi Ikar'i ◽  
Jun Zhang ◽  
Hiroaki Minamide ◽  
Hiromasa Ito
Keyword(s):  
Room Temperature ◽  
Frequency Conversion ◽  
Detection System ◽  
Wave Generation ◽  
Nonlinear Frequency ◽  
Nonlinear Frequency Conversion ◽  
Thz Wave ◽  
Frequency Agile

scholarly journals High Q-Factor Hybrid Metamaterial Waveguide Multi-Fano Resonance Sensor in the Visible Wavelength Range

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1583
Author(s):  
Hongyan Yang ◽  
Yupeng Chen ◽  
Mengyin Liu ◽  
Gongli Xiao ◽  
Yunhan Luo ◽  
...  
Keyword(s):  
Quality Factor ◽  
Wavelength Range ◽  
Fano Resonance ◽  
Q Factor ◽  
High Q ◽  
Visible Wavelength ◽  
Metamaterial Waveguide ◽  
Visible Wavelength Range ◽  
Resonance Sensor ◽  
Hybrid Metamaterial

We propose a high quality-factor (Q-factor) multi-Fano resonance hybrid metamaterial waveguide (HMW) sensor. By ingeniously designing a metal/dielectric hybrid waveguide structure, we can effectively tailor multi-Fano resonance peaks’ reflectance spectrum appearing in the visible wavelength range. In order to balance the high Q-factor and the best Fano resonance modulation depth, numerical calculation results demonstrated that the ultra-narrow linewidth resolution, the single-side quality factor, and Figure of Merit (FOM) can reach 1.7 nm, 690, and 236, respectively. Compared with the reported high Q-value (483) in the near-infrared band, an increase of 30% is achieved. Our proposed design may extend the application of Fano resonance in HMW from mid-infrared, terahertz band to visible band and have important research value in the fields of multi-wavelength non-labeled biosensing and slow light devices.

scholarly journals All-Fiber Hyperparametric Generation Based on a Monolithic Fiber Fabry–Pérot Microresonator

2020 ◽  
Vol 10 (20) ◽  
pp. 7024
Author(s):  
Kunpeng Jia ◽  
Xiaohan Wang ◽  
Jian Guo ◽  
Xin Ni ◽  
Gang Zhao ◽  
...  
Keyword(s):  
Optical Communications ◽  
Raman Effect ◽  
Optical Signal ◽  
Wave Mixing ◽  
Fiber System ◽  
Practical Applications ◽  
High Q ◽  
Broadband Light Source ◽  
Fabry Perot ◽  
Line Spacing

Hyperparametric oscillation is essential for coherent optical signal generation in a broad wavelength range. Integration in a compact system, such a broadband light source, is of special interest for practical applications requiring field-deployable spectroscopy devices. Here we demonstrate an all-fiber hyperparametric oscillation source based on four-wave mixing in a high-Q fiber Fabry–Pérot (FFP) microresonator. Assisted by the Raman effect, the generated optical signal spans over 400 nm with fine line-to-line spacing of 667 MHz. The compatibility of this FFP microresonator enables a robust and reliable all-fiber system through a splicing technique and fiber connectors. Such a plug-and-play platform is convenient and efficient for broad applications in optical communications and spectroscopy.

scholarly journals Efficient continuous-wave nonlinear frequency conversion in high-Q gallium nitride photonic crystal cavities on silicon

APL Photonics ◽  
2017 ◽  
Vol 2 (3) ◽  
pp. 031301 ◽  
Author(s):  
Mohamed Sabry Mohamed ◽  
Angelica Simbula ◽  
Jean-François Carlin ◽  
Momchil Minkov ◽  
Dario Gerace ◽  
...  
Keyword(s):  
Gallium Nitride ◽  
Photonic Crystal ◽  
Frequency Conversion ◽  
Continuous Wave ◽  
Nonlinear Frequency ◽  
Photonic Crystal Cavities ◽  
Nonlinear Frequency Conversion ◽  
High Q
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