東京工業大学 · 工学
宮本知行教授の研究室では、半導体レーザー素子や高周波・THzデバイスの開発を柱とし、特にガイナス(GaInNAs)を用いた長波長半導体レーザーや、0.3 THz帯のレーザー素子を用いた太赫ツ光イメージング技術の実用化に向けた基盤技術の確立を進めています。また、無線給電技術の限界を補完する光学的無線給電技術や、高耐久性を有する光受光モジュールの開発にも取り組んでいます。これらの研究は、次世代通信・センシング・エネルギー技術の基盤を築くことを目指しています。
Figures are computed from collected data and may differ slightly.
Abstract We report a feasibility study of a terahertz imaging system with resonant tunneling diodes (RTDs) that oscillate at 0.30 THz. A pair of RTDs acted as an emitter and a detector in the system. Terahertz reflection images of opaque samples were acquired with our RTD imaging system. A spatial resolution of 1 mm, which is equal to the wavelength of the RTD emitter, was achieved. The signal-to-noise ratio (SNR) of the reflection image was improved by 6 dB by using polarization optics that red
We propose a novel quantum-well (QW) structure for GaInNAs-GaAs lasers that can emit 1.3 μm or longer wavelength light. The idea is insertion of lattice-matched GaInNAs intermediate layers between well and barrier, which is effective for elongating the emission wavelength and reducing well thickness. It is shown that 1.3-μm emission is achievable by using the proposed GaInNAs-GaAs QW with a well thickness thinner than that of conventional rectangular GaInNAs QWs. This structure will relax the de
The power transmission technology to the equipment is remained behind in contrast to the progress of wireless communication. The existence of wiring and its connections greatly restrict the location of use, installation, maintenance, and configuration of the equipment. Solutions of wireless power transmission may lead to major changes in society, such as new services and new industries as well as convenience. Wireless power transmission such as electromagnetic induction is beginning to be put in
This is the first report on chemical beam epitaxy (CBE) of GaInNAs/GaAs quantum wells (QWs). From the observed clear X-ray diffraction satellite peaks, the QW structure incorporating nitrogen supplied by radical nitrogen was successfully grown. The photoluminescence emission with the emission peak wavelength of 1.0 µm was observed from GaInNAs/GaAs QWs at room temperature. The wavelength could be elongated by increasing the amount of nitrogen and indium.
This paper is an experimental characterization of a light-receiving module containing a fly-eye lens system with high tolerance to beam irradiation conditions. The fly-eye lens system, which is tolerant to fluctuations in beam shape, beam size, number of beams, beam incident position, and beam incident direction, was proposed, a light receiver module with a fly-eye lens system was constructed, and its characteristics were evaluated. The effect of the beam size on the fly-eye lens system was eval
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