LDRD REPORT 2021: HIGH-SENSITIVITY ELECTRIC FIELD DETECTION BASED ON GAS POLARIZATION

2021 ◽  
Author(s):  
KIMBERLY FESSLER ◽  
DALE HITCHCOCK ◽  
JAY GAILLARD ◽  
WILLIS JONES ◽  
JASON DARVIN ◽  
...  
Keyword(s):  
Electric Field ◽  
High Sensitivity ◽  
Field Detection

scholarly journals FY20 LDRD REPORT: HIGH-SENSITIVITY ELECTRIC FIELD DETECTION BASED ON GAS POLARIZATION

2020 ◽  
Author(s):  
KIMBERLY FESSLER ◽  
WILLIS JONES ◽  
DALE HITCHCOCK ◽  
JAY GAILLARD
Keyword(s):  
Electric Field ◽  
High Sensitivity ◽  
Field Detection

scholarly journals Sensing Electrochemical Signals Using a Nitrogen-Vacancy Center in Diamond

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 358
Author(s):  
Hossein T. Dinani ◽  
Enrique Muñoz ◽  
Jeronimo R. Maze
Keyword(s):  
Electric Field ◽  
Electron Spin ◽  
Electrolyte Solution ◽  
High Sensitivity ◽  
Theoretical Work ◽  
Coherence Time ◽  
Nitrogen Vacancy ◽  
Local Concentration ◽  
Concentration Of Ions ◽  
Nv Center

Chemical sensors with high sensitivity that can be used under extreme conditions and can be miniaturized are of high interest in science and industry. The nitrogen-vacancy (NV) center in diamond is an ideal candidate as a nanosensor due to the long coherence time of its electron spin and its optical accessibility. In this theoretical work, we propose the use of an NV center to detect electrochemical signals emerging from an electrolyte solution, thus obtaining a concentration sensor. For this purpose, we propose the use of the inhomogeneous dephasing rate of the electron spin of the NV center (1/T2★) as a signal. We show that for a range of mean ionic concentrations in the bulk of the electrolyte solution, the electric field fluctuations produced by the diffusional fluctuations in the local concentration of ions result in dephasing rates that can be inferred from free induction decay measurements. Moreover, we show that for a range of concentrations, the electric field generated at the position of the NV center can be used to estimate the concentration of ions.

A Miniature High-Sensitivity Active Electric Field Probe for Near-Field Measurement

2019 ◽  
Vol 18 (12) ◽  
pp. 2552-2556 ◽  
Author(s):  
Zheng Min ◽  
Zhaowen Yan ◽  
Wei Liu ◽  
Jianwei Wang ◽  
Donglin Su ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Measurement ◽  
Near Field ◽  
High Sensitivity ◽  
Electric Field Probe ◽  
Near Field Measurement

scholarly journals A High-Resolution Terahertz Electric Field Sensor Using a Corrugated Liquid Crystal Waveguide

Crystals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 302 ◽  
Author(s):  
Lan-Lan Xu ◽  
Yi Gong ◽  
Ya-Xian Fan ◽  
Zhi-Yong Tao
Keyword(s):  
Liquid Crystals ◽  
Electric Field ◽  
Defect Mode ◽  
High Sensitivity ◽  
Electric Field Sensor ◽  
Significant Performance ◽  
Dc Electric Field ◽  
Field Sensor ◽  
Field Sensing ◽  
Very High

Liquid crystals (LCs) can always reflect variable optical properties in a broad terahertz (THz) band under external electric or magnetic fields. Based on the measurements of these varying properties, we can realize electric and magnetic field sensing with very high sensitivity. Here, we theoretically and numerically demonstrate a type of electric field sensor in the THz frequency range based on the defect mode arising in a periodically corrugated waveguide with liquid crystals. The Bragg defect structure consisting of periodically corrugated metallic walls and a defect in the middle can provide a narrow transmitted peak with controllable bandwidth, which can be used for external field sensing when it is filled with LCs. The molecular orientation of nematic LCs (E7) is not only very sensitive to the applied DC electric field but also very crucial to the effective refractive index of E7. Changing the effective index can efficiently shift the frequency of the transmitted peak in the THz spectrum. The simulated results show that the sensitivity can reach as high as 9.164 MHz/(V/m) and the smallest resolution is 0.1115 V/m. The proposed sensor and its significant performance could benefit electric field sensing and extend the applications of THz technology.

scholarly journals Voltage control of ferromagnetic resonance

2016 ◽  
Vol 06 (02) ◽  
pp. 1630005 ◽  
Author(s):  
Ziyao Zhou ◽  
Bin Peng ◽  
Mingmin Zhu ◽  
Ming Liu
Keyword(s):  
Electric Field ◽  
Ferromagnetic Resonance ◽  
Exchange Coupling ◽  
Voltage Control ◽  
High Sensitivity ◽  
Microwave Devices ◽  
Coupling Mechanism ◽  
Volume Response ◽  
Time And Energy ◽  
Interfacial Charge

Voltage control of magnetism in multiferroics, where the ferromagnetism and ferroelectricity are simultaneously exhibiting, is of great importance to achieve compact, fast and energy efficient voltage controllable magnetic/microwave devices. Particularly, these devices are widely used in radar, aircraft, cell phones and satellites, where volume, response time and energy consumption is critical. Researchers realized electric field tuning of magnetic properties like magnetization, magnetic anisotropy and permeability in varied multiferroic heterostructures such as bulk, thin films and nanostructure by different magnetoelectric (ME) coupling mechanism: strain/stress, interfacial charge, spin–electromagnetic (EM) coupling and exchange coupling, etc. In this review, we focus on voltage control of ferromagnetic resonance (FMR) in multiferroics. ME coupling-induced FMR change is critical in microwave devices, where the electric field tuning of magnetic effective anisotropic field determines the tunability of the performance of microwave devices. Experimentally, FMR measurement technique is also an important method to determine the small effective magnetic field change in small amount of magnetic material precisely due to its high sensitivity and to reveal the deep science of multiferroics, especially, voltage control of magnetism in novel mechanisms like interfacial charge, spin–EM coupling and exchange coupling.

scholarly journals Sensing Enhancement of Electromagnetically Induced Transparency Effect in Terahertz Metamaterial by Substrate Etching

2021 ◽  
Vol 9 ◽  
Author(s):  
Tingling Lin ◽  
Yi Huang ◽  
Shuncong Zhong ◽  
Manting Luo ◽  
Yujie Zhong ◽  
...  
Keyword(s):  
Electric Field ◽  
Electromagnetically Induced Transparency ◽  
High Sensitivity ◽  
Strong Light ◽  
Refractive Index Sensing ◽  
Quadrupole Resonance ◽  
Matter Interaction ◽  
Potential Applications ◽  
Light Matter Interaction ◽  
Induced Transparency

A broad range of terahertz (THz) metamaterials have been developed for refractive index sensing. However, most of these metamaterials barely make sufficient use of the excited electric field which is crucial to achieve high sensitivity. Here, we proposed a metamaterial sensor possessing electromagnetically induced transparency (EIT) resonance that is formed by the interference of dipole and quadrupole resonance. In particular, the strengthening of light-matter interaction is realized through substrate etching, leading to a remarkable improvement in sensitivity. Hence, three kinds of etching mode were presented to maximize the utilization of the electric field, and the corresponding highest sensitivity is enhanced by up to ~2.2-fold, from 0.260 to 0.826 THz/RIU. The proposed idea to etch substrate with a strong light-matter interaction can be extended to other metamaterial sensors and possesses potential applications in integrating metamaterial and microfluid for biosensing.

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