Design of a metasurface-based dual-band Terahertz perfect absorber with very high Q-factors for sensing applications

2018 ◽  
Vol 416 ◽  
pp. 152-159 ◽  
Author(s):  
M. Janneh ◽  
A. De Marcellis ◽  
E. Palange ◽  
A.T. Tenggara ◽  
D. Byun
Keyword(s):  
Dual Band ◽  
Perfect Absorber ◽  
High Q ◽  
Sensing Applications ◽  
Q Factors ◽  
Very High

Realization of High-Q Fano Resonances in Ceramic Dielectric Metamaterials for Sensing Applications

2013 ◽  
Vol 2013 (CICMT) ◽  
pp. 000087-000093
Author(s):  
Elena Semouchkina ◽  
Arash Hosseinzadeh ◽  
George Semouchkin
Keyword(s):  
Numerical Experiments ◽  
Microstrip Line ◽  
High Sensitivity ◽  
Fano Resonances ◽  
High Q ◽  
Sensing Applications ◽  
Microwave Sensor ◽  
Q Factors ◽  
New Applications ◽  
Very High

Ceramic all-dielectric metamaterials are found to support very high Q resonances of the Fano-type, which until recently were largely attributed to the atomic physics phenomena. It is shown that proper arrangement of ceramic resonators in the metamaterial array allowsd for obtaining Q factors up to 15000. Thus high Q factors could be employed for new applications, in particular, for advanced sensing. An opportunity to design compact arrays that could be incorporated in a microwave sensor fed by a microstrip line is demonstrated. Numerical experiments have confirmed that Fano resonances in such arrays conserve high sensitivity to the dielectric permittivity of the controlled media.

Tunable dual-band plasmonic perfect absorber and its sensing applications

2019 ◽  
Vol 36 (10) ◽  
pp. 2750 ◽  
Author(s):  
Leilei Shi ◽  
Qian Tang ◽  
Zhengqi Liu ◽  
Ye Liu ◽  
Yuyin Li ◽  
...  
Keyword(s):  
Dual Band ◽  
Perfect Absorber ◽  
Sensing Applications

Numerical design of a metasurface-based ultra-narrow band terahertz perfect absorber with high Q-factors

Optik ◽  
2019 ◽  
Vol 194 ◽  
pp. 163071 ◽  
Author(s):  
Zhen Geng ◽  
Wei Su ◽  
Xinyu Wang ◽  
Yongfeng Jiang ◽  
Yan Liu
Keyword(s):  
Narrow Band ◽  
Perfect Absorber ◽  
High Q ◽  
Numerical Design ◽  
Q Factors

scholarly journals Ultra Narrow Dual-Band Perfect Absorber Based on a Dielectric−Dielectric−Metal Three-Layer Film Material

Micromachines ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1552
Author(s):  
Bin Liu ◽  
Pinghui Wu ◽  
Hongyang Zhu ◽  
Li Lv
Keyword(s):  
Plasmon Resonance ◽  
Near Infrared ◽  
Incident Angle ◽  
Structural Parameters ◽  
Dual Band ◽  
Refractive Index Sensor ◽  
Perfect Absorber ◽  
Film Material ◽  
High Q ◽  
Magnetic Polaritons

This paper proposes a perfect metamaterial absorber based on a dielectric−dielectric−metal structure, which realizes ultra-narrowband dual-band absorption in the near-infrared band. The maximum Q factor is 484. The physical mechanism that causes resonance is hybrid coupling between magnetic polaritons resonance and plasmon resonance. At the same time, the research results show that the intensity of magnetic polaritons resonance is much greater than the intensity of the plasmon resonance. By changing the structural parameters and the incident angle of the light source, it is proven that the absorber is tunable, and the working angle tolerance is 15°. In addition, the sensitivity and figure of merit when used as a refractive index sensor are also analyzed. This design provides a new idea for the design of high-Q optical devices, which can be applied to photon detection, spectral sensing, and other high-Q multispectral fields.

scholarly journals Deformed microcavities with very high Q-factors and directional farfield emission

2020 ◽  
Vol 238 ◽  
pp. 01006
Author(s):  
Arne Behrens ◽  
Martí Bosch ◽  
Martina Hentschel ◽  
Stefan Sinzinger
Keyword(s):  
Surface Roughness ◽  
State Of The Art ◽  
Whispering Gallery Mode ◽  
Q Factor ◽  
Tapered Fiber ◽  
High Q ◽  
Whispering Gallery ◽  
Q Factors ◽  
Very High

We report the design and optimized fabrication of deformed whispering gallery mode resonators in silica with solely ICP-RIE. This allows us to control the morphology of the resonators more freely and results in low surface roughness. The light was coupled into the resonator using a state of the art tapered fiber approach and we determined the Q-factor in the range of 105

Design and simulation of a photonic crystal resonator as a biosensor for point-of-care applications

2020 ◽  
Vol 87 (7-8) ◽  
pp. 470-476
Author(s):  
Yixiong Zhao ◽  
Kunj Himanshu Vora ◽  
Gerd vom Bögel ◽  
Karsten Seidl ◽  
Jens Weidenmüller
Keyword(s):  
Photonic Crystal ◽  
Resonant Frequency ◽  
Electromagnetic Waves ◽  
Point Of Care ◽  
Dielectric Materials ◽  
Operating Personnel ◽  
High Q ◽  
Sensing Applications ◽  
Crystal Resonator ◽  
Very High

AbstractPoint-of-care (POC) devices are essential for rapid testing of samples for early diagnosis of diseases. The accuracy and the sensitivity of the POC device depend mainly on the biosensors. The currently used POC devices require specialized operating personnel, long sample preparation time and high equipment costs. We aim to explain a bio-sensing concept using a photonic crystal (PC) resonator that would mitigate the drawbacks of the present sensing techniques. Photonic crystals consist of spatially arranged dielectric materials presenting a band gap that prevents electromagnetic waves of certain frequency range to propagate through it. PC resonators have shown to have very high sensitivities for bio-sensing applications at THz frequencies. A PC resonator with a high Q-factor is designed and simulated to detect the changes in the surrounding dielectric permittivity. As an application for detecting specific biomolecules, a protocol for surface functionalization has been explained. This will enable the selective binding of biomolecules from the sample. Shift in resonant frequency and attenuation in magnitude at the peak resonant frequency can be observed from the simulation results. These changes in the resonator properties can be indicative of the presence of a particular biomolecule or pathogen and its concentration within the sample.

scholarly journals A Three-Dimensional Dual-Band Terahertz Perfect Absorber as a Highly Sensitive Sensor

2021 ◽  
Vol 9 ◽  
Author(s):  
Wei Yin ◽  
Zhonglei Shen ◽  
Shengnan Li ◽  
Liuyang Zhang ◽  
Xuefeng Chen
Keyword(s):  
Impedance Matching ◽  
Three Dimensional ◽  
Interfacial Area ◽  
Absorption Efficiency ◽  
Matching Theory ◽  
Dual Band ◽  
Perfect Absorber ◽  
Sensing Applications ◽  
Highly Sensitive ◽  
Wide Range

Terahertz (THz) absorbers are highly desirable in sensing and detection devices. Herein, we have proposed a 3D dual-band near-perfect absorber that works in the THz regime for sensing applications. The theoretical calculation shows that the absorption efficiency of the absorber can reach 99.0 and 97.0% at 1.125 and 1.626 THz, respectively. Double absorption peaks can be tuned independently by alternating the geometric parameters of unit resonators. The underlying physical mechanism of the absorber matches well with the well-known impedance matching theory. Compared with its planar counterpart, our proposed absorber exhibits a figure of merit enhancement of at least two times due to its out-of-plane induced large interfacial area. Additionally, the absorber can work robustly at a wide range of incident angles and keep insensitive to polarization states, which renders it great for highly sensitive sensing.

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