High Q-factor fano resonances on permittivity-asymmetric dielectric meta-surfaces

2021 ◽  
Author(s):  
Yusen Wang ◽  
Zonghai Hu ◽  
Tonggang Zhao ◽  
Shilin Yu ◽  
Ziang Gao
Keyword(s):  
Q Factor ◽  
Fano Resonances ◽  
High Q

Triple-band high Q factor Fano resonances in bilayer THz metamaterials

2016 ◽  
Vol 370 ◽  
pp. 116-121 ◽  
Author(s):  
Chunfeng Ding ◽  
Liang Wu ◽  
Degang Xu ◽  
Jianquan Yao ◽  
Xiaohong Sun
Keyword(s):  
Q Factor ◽  
Fano Resonances ◽  
High Q ◽  
Triple Band

High Q-factor multi-Fano resonances in all-dielectric double square hollow metamaterials

2021 ◽  
Vol 140 ◽  
pp. 107072
Author(s):  
Hao Li ◽  
Shilin Yu ◽  
Lei Yang ◽  
Tonggang Zhao
Keyword(s):  
Q Factor ◽  
Fano Resonances ◽  
High Q

scholarly journals Active Switching of Extremely High-Q Fano Resonances Using Vanadium Oxide-Implanted Terahertz Metamaterials

2020 ◽  
Vol 10 (1) ◽  
pp. 330
Author(s):  
Jing Ma ◽  
Zhi-Hang Wang ◽  
Huan Liu ◽  
Ya-Xian Fan ◽  
Zhi-Yong Tao
Keyword(s):  
Vanadium Oxide ◽  
Fano Resonance ◽  
Surface Current ◽  
Switching Behavior ◽  
Temperature Sensitive ◽  
Q Factor ◽  
Fano Resonances ◽  
Thermally Induced ◽  
High Q ◽  
Order Of Magnitude

In this paper, we demonstrate an active switching of extremely high Q-factor Fano resonances using vanadium oxide (VO2)-implanted THz asymmetric double C-shaped metamaterial (MM) structures. The simulation results indicate the highly temperature-sensitive nature of the double Fano resonances that can be switched at very low external thermal pumping (68 °C), which is only slightly higher than room temperature. We employ the surface current and electric field distributions of the structure to analyze the physical mechanism of the observed switching behavior in the thermally excited Fano MMs. More importantly, by optimizing the asymmetric parameter (offset length), the linewidth of the Fano resonance can reach only 0.015 THz and the Q-factor is as high as 98, which is one order of magnitude higher than that of the traditional MMs. The findings of this work would enable a thermally-induced high-Q Fano resonance MMs for ultra-sensitive sensors, modulators, low threshold switching in metadevices.

scholarly journals High Q-factor multiple Fano resonances for high-sensitivity sensing in all-dielectric metamaterials

OSA Continuum ◽  
2019 ◽  
Vol 2 (10) ◽  
pp. 2818 ◽  
Author(s):  
Wudeng Wang ◽  
Li Zheng ◽  
Li Xiong ◽  
Jianguang Qi ◽  
Baoying Li
Keyword(s):  
High Sensitivity ◽  
Q Factor ◽  
Fano Resonances ◽  
High Q

High Q-factor multiple fano resonances based on triple dielectric strips metasurface

2021 ◽  
Author(s):  
Shaozhe Song ◽  
Shilin Yu ◽  
Hao Li ◽  
Tonggang Zhao
Keyword(s):  
Q Factor ◽  
Fano Resonances ◽  
High Q

scholarly journals High-Q-Factor Tunable Silica-Based Microring Resonators

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 256
Author(s):  
Yue-Xin Yin ◽  
Xiao-Pei Zhang ◽  
Xiao-Jie Yin ◽  
Yue Li ◽  
Xin-Ru Xu ◽  
...  
Keyword(s):  
Optical Communications ◽  
Microring Resonator ◽  
Microring Resonators ◽  
Q Factor ◽  
Notch Depth ◽  
Critical Coupling ◽  
Practical Application ◽  
Coupling Condition ◽  
High Q ◽  
Racetrack Resonator

A high-Q-factor tunable silica-based microring resonator (MRR) is demonstrated. To meet the critical-coupling condition, a Mach–Zehnder interferometer (MZI) as the tunable coupler was integrated with a racetrack resonator. Then, 40 mW electronic power was applied on the microheater on the arm of MZI, and a maximal notch depth of about 13.84 dB and a loaded Q factor of 4.47 × 106 were obtained. The proposed MRR shows great potential in practical application for optical communications and integrated optics.

Dielectric-loaded L-band filters for high-power space applications

2021 ◽  
pp. 1-11
Author(s):  
Paolo Vallerotonda ◽  
Fabrizio Cacciamani ◽  
Luca Pelliccia ◽  
Alessandro Cazzorla ◽  
Davide Tiradossi ◽  
...  
Keyword(s):  
High Power ◽  
Dielectric Resonators ◽  
Q Factor ◽  
Rf Power ◽  
Space Applications ◽  
High Q ◽  
Critical Issues ◽  
L Band ◽  
Multipactor Discharge ◽  
Filter Response

Abstract The design and first experimental results of Tx and Rx L-band bandpass filters for a high-power satellite diplexer are presented in this paper. Designed in the framework of an ESA ARTES AT project, the filters are based on TM010 mode dielectric resonators. These resonators allow for better results in terms of volume occupation with respect to other dielectric resonators still maintaining high Q-factor values (>2000). Volume saving above 30% is achieved with respect to standard coaxial filters. The filter geometries and materials have been chosen in order to improve the power-handling and to cope with related critical issues for space applications (i.e. avoid any multipactor discharge in the operating RF power range and low-PIM response). Measurements of Tx filter show good correlation with the design in terms of central frequency, BW, and unloaded Q-factor (almost 3000). Measurements of Rx filter show a worse correlation with the design in terms of filter response shape. This is ascribed to size tolerances of one of the filter resonators. Multiple analyses are ongoing to remove this degradation in the final engineering model.

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