Development of the junction-type Ge detector with a two-dimensional structure sensitive to the unexplored waveband and the practical use of the detector

2019 Fiscal Year Final Research Report

• Project/Area Number: 18K18773
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 16:Astronomy and related fields
• Research Institution: Nagoya University
• Principal Investigator: Toyoaki Suzuki 名古屋大学, 理学研究科, 助教 (30534599)
• Project Period (FY): 2018-06-29 – 2020-03-31
• Keywords: 赤外線天文学 / 遠・中間赤外線検出器 / ゲルマニウム

Outline of Final Research Achievements

Astronomical observations in the wavelength range of 30-60 microns (unexplored waveband) are an important window for astronomy, but have never been performed. The reason is that there is no IR detectors sensitive to the unexplored waveband. Therefore, the goal of this study is to develop high-sensitive IR detectors which cover the unexplored waveband by changing the detector structure and is to demonstrate the practical use of the detector. The detector has been successfully fabricated and was cooled down to 2 K to measure IR responsivity. As a result, the detector responsivity in the unexplored waveband shows one-order of magnitude higher than conventional IR detectors.

Free Research Field

赤外線天文学

Academic Significance and Societal Importance of the Research Achievements

未開拓波長帯の高感度化の実証に成功したことによって、今までアクセスできなかったガス輝線や固体物質のバンド放射を観測でき、宇宙空間の物質・物理状態の重要な情報を取得でき、現代天文学が掲げる宇宙の物質・生命進化の研究分野を切り開くことができる。