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.

今年，我的研究取得了三项重要成果。1）首先，通过展示商用宽带的表征，阐明了电光（EO）测量表征太赫兹（THz）器件的能力或“价值” 30 GHz 至 500 GHz 的球面波发生设备是第一个通过使用设备可视化自由空间中的幅度和相位分布来表征高达 500 GHz 的太赫兹设备。 EO 探针的两个关键是利用有机 EO 材料（4-二甲氨基-N-甲基-4-芪唑鎓甲苯磺酸盐，DAST）来提高灵敏度，并通过引入折射率接近空气的聚苯乙烯泡沫塑料支架来降低侵入性。 2）其次，进一步研究了“Terajet”的特性，“Terajet”被定义为太赫兹区域的光子纳米喷射。阐明了由介电立方体生成的 Terajet 的角度特性。实验结果表明，生成的 Terajet 与入射光束相同，并且在广角照明范围内保持了 Terajet 的亚波长半峰全宽。 3 ）第三，提出并论证了Terajet的两个实际应用，一是增强太赫兹成像系统的空间分辨率，二是增强EO探头的灵敏度。

项目成果

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

基于介电立方体太射流生成的太赫兹成像系统空间分辨率增强

• DOI: 10.1063/1.4983114
• 发表时间: 2017
• 作者: Hai Huy Nguyen Pham; Shintaro Hisatake; Oleg V. Minin; Tadao Nagatsuma;Igor V. Minin
• 通讯作者: Igor V. Minin

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

不同光照条件下介电长方体产生太射流的实验表征

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

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
• 影响因子: 0.5
• 作者: T. Nagatsuma S. Hisatake;H. H. N. Pham
• 通讯作者: 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;Kunio Miyaji
• 通讯作者: Kunio Miyaji

Asymmetric phase anomaly of terajet generated from dielectric cube under oblique illumination

斜射介质立方体产生的太射流不对称相位异常

• DOI: 10.1063/1.4983640
• 发表时间: 2017
• 影响因子: 4
• 作者: Hai Huy Nguyen Pham; Shintaro Hisatake; Oleg V. Minin; Tadao Nagatsuma;Igor V. Minin
• 通讯作者: Igor V. Minin