Electric Field Sensor Based on High Q Fano Resonance of Nano-Patterned Electro-Optic Materials

Yin, Xiaowei; Liu, Fengli; Qiu, Wentao; Liu, Can; Guan, Heyuan; Lu, Hai

doi:10.3390/photonics9060431

Cited by 3 publications

(2 citation statements)

References 36 publications

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“…As the refractive index of the crystal changes with the external electric field, the amount of light exchanged between the crystal and the fiber changes along with the total amount of light transmitted through the fiber [12,18]. In this work, we perform polarimetry measurements by means of an electro-optic sensor, which was already developed and characterized in [19].…”

Section: Methodsmentioning

confidence: 99%

“…Measuring techniques based on resonant cavities use transducers obtained by creating an interface between an optical fiber and an EO crystal. As the refractive index of the crystal changes with the external electric field, the amount of light exchanged between the crystal and the fiber changes along with the total amount of light transmitted through the fiber [ 12 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Diagnostics of Internal Defects in Composite Overhead Insulators Using an Optic E-Field Sensor

Fasani,

Barbieri,

Villa

et al. 2024

Sensors

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Composite insulators for high-voltage overhead lines have better performances and are lighter than traditional designs, especially in heavily polluted areas. However, since it is a relatively recent technology, reliable methods to perform live-line diagnostics are still under development, especially with regard to internal defects, which provide few external symptoms. Thermal cameras can be employed, but their use is not always straightforward as the sun radiation can hide the thermal footprint of internal degenerative effects. In this work, an optical E-field sensor has been used to diagnose the internal defects of a set of composite insulators (bandwidth 200 mHz–50 MHz, min. detectable E-field 100 V/m). Moreover, a modelling activity using finite elements has been carried out to identify the possible nature of the defects by comparing experimental E-field profiles with those simulated assuming a specific defect geometry. The results show that the sensor can detect the presence of an internal defect, since its presence distorts the E-field profile when compared to the profile of a sound insulator. Moreover, the measured E-field profiles are compatible with the corresponding simulated ones when a conductive defect is considered. However, it was observed that a defect whose conductivity is not at least two orders of magnitude greater than the conductivity of the surroundings remains undetected.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Diagnostics of Internal Defects in Composite Overhead Insulators Using an Optic E-Field Sensor

Fasani,

Barbieri,

Villa

et al. 2024

Sensors

View full text Add to dashboard Cite

show abstract

Electrical field sensing in an etchless lithium niobate heterostructure with Low driving voltage based on quasi-bound states in the continuum

Huang,

Wang,

Yuan

et al. 2023

Indian J Phys

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Realizing lithium niobate-based electric eld (E-eld) sensor for low driving voltage has been attractive extensive attention in eld of extremely weak electric eld detection, wireless communications, and even astronomical observations. However, lithium niobate (LN) is di cult to be etched with high accuracy.Here, we theoretically proposed a heterostructure E-eld sensor consisted of etchless LN thin lm and metagratings to support Fabry-Perot-like BIC mode, which has not only ultrahigh quality (Q) factor but also large extinction ratio. Due to the loss of electrodes, the BIC mode transitions into quasi-BIC resonance with Q factor of 2050. This quasi-BIC resonance is utilized to con ne electromagnetic eld inside the LN layer leading to an optical eld enhancement factor to 14.2 times normalized to unpatterned thin lm LN. And this resonance also boosts the strong interaction among optical eld, EO material and applied electric eld. Numerical simulations are carried out to demonstrate the Fabry-Perotlike quasi-BIC resonance is sensitive to the refractive index change Δn of LN material. As a result, we construct the relationship between the Δn and the applied electric eld and successfully obtained a tuning sensitivity of 40.8 nm/V and low driving voltage of 18.9 mV with wavelength resolution of 0.38 nm. Meanwhile, we estimate the 3dB bandwidth of the E-eld sensor should exceed 154 GHz after considering the low parasitic capacitance of LN material and high conductivity of electrodes. And we believe that the LN-based heterostructure has potential applications in ultralow driving voltage E-eld sensors.

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基于铌酸锂电光效应的电场传感器研究进展（特邀）

Deng Shiyao,

Peng Jiahao,

Wang Libo

et al. 2024

激光与光电子学进展

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Electric Field Sensor Based on High Q Fano Resonance of Nano-Patterned Electro-Optic Materials

Cited by 3 publications

References 36 publications

Diagnostics of Internal Defects in Composite Overhead Insulators Using an Optic E-Field Sensor

Diagnostics of Internal Defects in Composite Overhead Insulators Using an Optic E-Field Sensor

Electrical field sensing in an etchless lithium niobate heterostructure with Low driving voltage based on quasi-bound states in the continuum

基于铌酸锂电光效应的电场传感器研究进展（特邀）

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