豊橋技術科学大学

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Ariyoshi, Seiichiro

Affiliation Electronics-Inspired Interdisciplinary Research Institute(EIIRIS)
Title Associate Professor
Fields of Research Terahertz Technology, Superconducting Devices
Degree Dr. of Engineering (The Graduate University for Advanced Studies)
Academic Societies The Japan Society of Applied Physics, Cryogenics and Superconductivity Society of Japan, IEEE MTT-S
E-mail ariyoshi@ens
Please append ".tut.ac.jp" to the end of the address above.
Laboratory website URL http://ens.tut.ac.jp/terahertz/
Researcher information URL(researchmap) Researcher information

Research

テラヘルツ光(周波数0.1~10THz、波長3mm~30um)は、電波と可視光それぞれの技術的進展とは対照的に"光のフロンティア"と呼ばれています。この光領域は人間の目では見えないものを透視することができたり、X線やγ線に比べて被ばくの危険性が無いなどの優れた特長をもっているため、これを活かしたセキュリティー応用やメディカル診断、天文観測や物性研究など、様々な分野でのテラヘル ツ光応用の可能性を秘めています。
本研究室では、超伝導体を用いた高感度テラヘルツ波検出デバイスの開発やテラヘルツ2次元分光技術の研究、およびこれらを駆使した新たな応用分野の開拓を目指しています。

Theme1:Development of Superconducting Terahertz-wave Sensors

Overview
Left: Fabricated spiral-MKIDs on a sapphire substrate. Right: Microscopy image of a spiral-MKID. The NbN film thickness is 140 nm and its Tc is 12.7 K.

Two-dimensional terahertz spectroscopy offers potential opportunities in material science research into soft materials for example, and industrial application development. This laboratory have progressed the development of a Microwave Kinetic Inductance Detector (MKID, Fig.1) array operating at 3 K with a cryogen-free He-4 refrigerator, and exhibiting both superior detection sensitivity of greater than one digit or more compared to conventional semiconductor bolometers, and greater speed response. Such an array aims to realize the application of a 2D-Fourier transform terahertz spectrometer.

Selected publications and works

S. Ariyoshi, K. Nakajima, A. Saito, T. Taino, H. Tanoue, K. Koga, N. Furukawa, H. Yamada, S. Ohshima, C. Otani, J. Bae, “NbN-Based Microwave Kinetic Inductance Detector with a Rewound Spiral Resonator for Broadband Terahertz Detection”, Applied Physics Express, Vol.6, pp.064103_1-3 (2013).

Keywords

Microwave Kinetic Inductance Detectors

Theme2:Terahertz Spectroscopy of General-purpose Plastics

Overview

Polymer properties such as hardness, fragility, workability, and thermal stability are determined not only by the chemical composition but also the higher-order structure related to the crystallinity, molecular chain length, and chain packing in the solid state. In conventional diagnostic methods employed for general-purpose plastics, destructive techniques to measure tensile and bending strengths and subjective observation of the degree of deterioration such as a change in color or transparency are commonly applied. New analysis techniques are currently being developed to allow nondestructive and objective inspection of plastics.

Selected publications and works

S. Ariyoshi, N. Hiroshiba, Y. Tanzawa, Y. Ichikawa, J. Bae, “Broadband terahertz spectroscopy of polypropylenes with different tacticities”, Materials Research Express, Vol.1, pp.045303_1-6 (2014).

Keywords

General-purpose Plastics, Nondestructive Analysis

Title of class

[Undergraduate school]
・Mathematical Engineering and Information Processing (B14620160)
・English for science and technology 2 (B1460007c)
・Laboratory Works in Environmental and Life Sciences (B14600020)
・Fundamental Electric and Electronic Engineering (B14510080)
[Graduate school]
・Advanced Environmental Sensor Technology (M24630040)
・Advanced Environmental Technology 1 (D34030010)


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