電磁波の動的可視化による次世代ミリ波・テラヘルツ波デバイスの研究

利用电磁波动态可视化研究下一代毫米波和太赫兹波器件

• 批准号: 16J05800
• 负责人: Nguyen Pham Hai Huy (2017)
• 金额: $ 1.02万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2016
• 资助国家: 日本
• 起止时间: 2016-04-22 至 2018-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16J05800/
• 关键词: Electro-optic probe,; THz device,; Terajet,; high sensitivity,; high resolution,; low invasiveness; Electro-optic sensor; THz wave visualization; signal-to-noise ratio; detectable bandwidth; Terajet; dielectric cube; subwavelength resolution /

In this year, three important achievements were obtained in my study.1) First, the capability or “value” of electro-optic (EO) measurement to characterize terahertz (THz) devices was clarified by demonstrating the characterization of a commercially available broad bandwidth spherical-wave-generating device from 30 GHz to 500 GHz. It was the first THz device characterization up to 500 GHz by visualizing the amplitude and phase distributions in free-space from the device using the EO probe. The sensitivity enhancement by exploiting an organic EO material (4-dimethylamino-N-metyl-4-stilbazolium tosylate, DAST) and the invasiveness reduction by introducing a Styrofoam holder, which has refractive index close to air, were two key techniques to obtain this result.2) Second, the characteristics of the “Terajet”, which is defined as the photonic nanojet in the THz region, were studied further. Particularly, the angular characteristics of the Terajet generated from a mesoscale dielectric cube were clarified. The experimental results indicated that the generated Terajet is identical to the incident beam and the subwavelength full width at half maximum of the Terajet is maintained within a wide angle of illumination.3) Third, two practical applications of the Terajet were proposed and demonstrated. One is to enhance the spatial resolution of THz imaging system. The other is to enhance the sensitivity of the EO probe.

本年度取得了三项重要成果：1）通过对30 ~ 500 GHz的宽带球面波发生器的特性分析，阐明了电光测量技术在太赫兹（THz）器件特性分析中的“价值”。这是第一个通过使用EO探针可视化设备在自由空间中的振幅和相位分布来表征高达500 GHz的THz设备。采用有机电光材料（4-二甲氨基-N-甲基-4-苯乙烯基甲苯磺酸盐，DAST）提高灵敏度和引入折射率接近空气的聚苯乙烯泡沫保持器降低侵入性是获得这一结果的两个关键技术。特别是，从介尺度介质立方体产生的Terajet的角度特性进行了澄清。实验结果表明，所产生的Terajet与入射光束完全一致，并且在大角度照射下，Terajet的亚波长半高宽保持不变。3）提出并论证了Terajet的两种实际应用。一是提高太赫兹成像系统的空间分辨率。二是提高EO探头的灵敏度。

项目成果

Experimental characterization of terajet generated from dielectric cuboid under different illumination conditions

• DOI: 10.1109/gsmm.2017.7970306
• 发表时间: 2017-05
• 期刊: 2017 10th Global Symposium on Millimeter-Waves
• 作者: Hai Huy Nguyen Pham;S. Hisatake;T. Nagatsuma;I. Minin;O. Minin

Enhancement of spatial resolution of terahertz imaging systems based on terajet generation by dielectric cube

• DOI: 10.1063/1.4983114
• 发表时间: 2017-05-01
• 期刊: APL PHOTONICS
• 影响因子: 5.6
• 作者: Hai Huy Nguyen Pham;Hisatake, Shintaro;Minin, Igor Vladilenovich
• 通讯作者: Minin, Igor Vladilenovich

Photonics for Millimeter-Wave and Terahertz Sensing and Measurement

用于毫米波和太赫兹传感和测量的光子学

• DOI: 10.1587/transele.e99.c.173
• 发表时间: 2016
• 期刊: IEICE Transactions on Electronics
• 影响因子: 0.5
• 作者: T. Nagatsuma S. Hisatake;and H. H. N. Pham
• 通讯作者: and H. H. N. Pham

Electric-field visualization technique for evaluating radiation from automotive millimeter-wave radar

用于评估汽车毫米波雷达辐射的电场可视化技术

• 发表时间: 2017
• 作者: Koki Yamaguchi;Hikaru Nakajima;Hai Huy Nguyen Pham;Shintaro Hisatake;Tadao Nagatsuma;Hirohisa Uchida;Makoto Tojo;Yoichi Oikawa;and Kunio Miyaji
• 通讯作者: and Kunio Miyaji

Angular characteristic of terajet generated from dielectric cuboid in THz region

太赫兹区域介电长方体产生太射流的角度特性

• 发表时间: 2017
• 作者: Hai Huy Nguyen Pham;Shintaro Hisatake;Igor V. Minin;Oleg V. Minin;and Tadao Nagatsuma
• 通讯作者: and Tadao Nagatsuma