Review and Modification of Permittivity Measurement on Open Resonator for Transparent Material Measurements at Terahertz

Chen, Haidong; Chen, Hao; Che, Wenquan; Zheng, Shimin; Xiu, Xin; Xue, Quan

doi:10.1109/tim.2020.2998565

Cited by 20 publications

(4 citation statements)

References 32 publications

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“…In the resonator methods [18] [19], a sensor circuit is attached to the material under test (MUT), and its dielectric property is estimated from the resonance frequency characteristics of the circuit. Several types of resonator sensors were investigated, such as microwave patches [19], split-rings [20], waveguides [21], and combinations of sensor devices [22]- [24]. However, there is an issue with sensor attachment in the millimeter wave and higher frequency bands.…”

Section: Introductionmentioning

confidence: 99%

Multi-Layer Building Material Modeling and Parameter Estimation Method by Wide-Band Free Space Measurement

Saito,

Kang,

Takada

2024

IEEE Access

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Section: Introductionmentioning

confidence: 99%

Multi-Layer Building Material Modeling and Parameter Estimation Method by Wide-Band Free Space Measurement

Saito,

Kang,

Takada

2024

IEEE Access

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“…Infrared optics and THz optics have various practical applications, including spectroscopy [1,2], optical metrology [3], material measurements [4], sensing [5], diagnostics, detection, identification of substances, etc. One of the possible ways to obtain laser radiation in these ranges of the frequencies is via a frequency down-conversion process, due to the difference frequency's wave generation in a medium with a quadratic nonlinear response.…”

Section: Introductionmentioning

confidence: 99%

Frequency Down-Conversion of Optical Pulse to the Far Infrared and THz Frequency Ranges Due to the Cascading Process in a Medium with a Quadratic Nonlinear Response

et al. 2022

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Difference-frequency generation is a well-known method of obtaining IR and THz radiation. It has many practical applications, such as sensing, optical metrology, diagnostics, detection and identification of substances, etc. One of the generation methods is based on the three-wave interaction in a medium with second-order nonlinear susceptibility. In this study, we investigated a special case of the frequency down-conversion into IR and THz ranges of the frequencies: the frequencies of interacting waves were multiple. We analyzed theoretically two cases of three-wave interactions: amplification of the infrared (or THz) radiation (incident weak intensity of a wave at this frequency) and a wave generation with the difference-frequency (incident zero-value intensity at this frequency). The amplification efficiency could achieve 75% and the maximal frequency conversion efficiency is about 25%. The computer simulation results made for the femtosecond pulse interaction in a crystal with the wavelength 4,10, and 24μm demonstrates applicability of such a scheme for the frequency down-conversion. This scheme of the THz radiation generation is a perspective tool for its application in the screening system for the detection and identification of substances.

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“…The dielectric properties of microwave dielectric materials are the basis for the integration and development of microwave technology. In the terahertz(THz) frequency range, the open resonator has been widely used in the dielectric constant test of materials due to its advantages of high Q value, no peripheral metal loss and convenient test [1][2]. In this paper, a new coupling method of quasi-optical resonator is designed in the form of coupling plate processed by PCB substrate and pressurized flange in the 110~170GHz frequency band.…”

mentioning

confidence: 99%

A Quasi-optical resonator with new coupling method and parasitic-mode-suppressing in 110 ~ 170GHz

Cheng

Zhang

Long

et al. 2023

Preprint

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In this paper, a quasi-optical resonator with new coupling method and parasitic-mode-suppressing in 110~170GHz is proposed. The coupling of THz quasi-optical resonator in this paper is realized by PCB substrate processing and pressurized flange. At the same time, the parasitic mode is effectively suppressed by slitting the plane mirror to reduce the influence on the main mode during the test. And fused quartz sample was tested to verify the feasibility of the system for complex dielectric testing of materials in 110~170GHz.

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Review and Modification of Permittivity Measurement on Open Resonator for Transparent Material Measurements at Terahertz

Cited by 20 publications

References 32 publications

Multi-Layer Building Material Modeling and Parameter Estimation Method by Wide-Band Free Space Measurement

Multi-Layer Building Material Modeling and Parameter Estimation Method by Wide-Band Free Space Measurement

Frequency Down-Conversion of Optical Pulse to the Far Infrared and THz Frequency Ranges Due to the Cascading Process in a Medium with a Quadratic Nonlinear Response

A Quasi-optical resonator with new coupling method and parasitic-mode-suppressing in 110 ~ 170GHz

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