Nanoscopic live electrooptic imaging

Tsuchiya, Masahiro; Takata, Shigeru; Ohsone, Kazuhiro; Fukui, Shinji; Yorinaga, Muneo

doi:10.1038/s41598-021-85095-8

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…Complex and expensive array systems are only in exchange for efficiency increases under special measurement conditions, such as limited frequencies or limited imaging areas. High-speed CCD camera is used to realize real-time electromagnetic field imaging by detecting the variation of the optic signals varies through the diamond of ZnTe [26] and nitrogen-vacancy center [27]. Limited by the size of CCD, the imaging area of these methods is only tens of millimeters at most, which cannot meet the needs of antenna near-field measurement.…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency Diagnosis of Antenna Radiation Characteristics Based on Scanning Optic-Induced Plasma Scattering Technology

Leng

Jin

et al. 2023

IEEE Trans. Antennas Propagat.

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This paper presents an innovative quasi-real-time antenna near-field diagnosis method, by scanning a laser induced plasma on a silicon wafer and imaging the field with the synchronously produced scattered signals. Several approaches have been devised to adapt to the antenna diagnosis scenarios. By using the multilayer matching approach, the issue of multiple reflection disturbance between the aperture and silicon wafer is avoided, especially for large aperture antenna at high frequencies. The accuracy of near-field distribution is improved, and far-field patterns can be transformed directly. The experiment results of a Ka-band 20dB standard antenna agree well with the simulation results. Diagnosis of radiation states in the reactive near-field region is demonstrated, and the resonate modes of a 2.4 GHz WiFi patch antenna at different frequencies are clearly observed. The experiments of a TM01 mode antenna verify the full polarization diagnosis ability of the method, and the linear polarization component is measured with the help of a polarization grid. The demonstrated diagnosis method has the advantages of high efficiency, ultra-close measurement distance, super resolution, and provides a highly promising and widely available method for antenna diagnosis.

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Section: Introductionmentioning

confidence: 99%

High-Efficiency Diagnosis of Antenna Radiation Characteristics Based on Scanning Optic-Induced Plasma Scattering Technology

Leng

Jin

et al. 2023

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

show abstract

Real-time imaging of electromagnetic fields

Leng

Jin

et al. 2022

Opt. Express

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The measurement and diagnosis of electromagnetic fields are important foundations for various electronic and optical systems. This paper presents an innovative optically controlled plasma scattering technique for imaging electromagnetic fields. On a silicon wafer, the plasma induced by the photoconductive effect is exploited as an optically controlled scattering probe to image the amplitude and phase of electromagnetic fields. A prototype is built and realizes the imaging of electromagnetic fields radiated from antennas from 870MHz to 0.2 terahertz within one second. Measured results show good agreement with the simulations. It is demonstrated that this new technology improves the efficiency of electromagnetic imaging to a real-time level, while combining various advantages of ultrafast speed, super-resolution, ultra-wideband response, low-cost and vectorial wave mapping ability. This method may initiate a new avenue in the measurement and diagnosis of electromagnetic fields.

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Nanoscopic live electrooptic imaging

Cited by 2 publications

References 23 publications

High-Efficiency Diagnosis of Antenna Radiation Characteristics Based on Scanning Optic-Induced Plasma Scattering Technology

High-Efficiency Diagnosis of Antenna Radiation Characteristics Based on Scanning Optic-Induced Plasma Scattering Technology

Real-time imaging of electromagnetic fields

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