| Project/Area Number |
24654048
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Astronomy
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
HIROYUKI Maezawa 大阪府立大学, 理学(系)研究科(研究院), 准教授 (00377780)
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| Research Collaborator |
入交 芳久 情報通信研究機構
関根 徳彦 情報通信研究機構
寶迫 巌 情報通信研究機構
山本 智 東京大学
大口 脩 東京大学
切通 遼介 大阪府立大学
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 宇宙物理学 / 地球惑星科学 / ヘテロダイン分光 / 検出器 / 超伝導デバイス / テラヘルツ / 量子カスケードデバイス / 位相同期回路 / リモートセンシング / 電波天文学 / テラヘルツ波 / 量子カスケードレーザー / 超伝導ミクサ検出素子 / デバイスプロセス |
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| Research Abstract |
A certain portion of spectral lines from gas species in interstellar mediums, and planetary atmospheres lies in the 1-10 THz frequency band. In the light of analyzing these signals, heterodyne spectroscopy in the field of radio astronomy provides a high frequency resolution that allows us to study the physical and chemical conditions. However, astronomy in the 1-10 THz band has been long unexplored because of the lack of good observing sites and availability of high-sensitivity heterodyne receivers operating in this frequency range. One of the key aspects of future THz-band radio astronomy is the high efficient observations with multibeam receivers. Quantum cascade lasers with output powers in the sub-mW range operating at the 1-10 THz bands are potential candidates as local oscillators for multibeam receivers. In this study, we developed a PLL system to phase-lock such a free running THz-band signal directly by utilizing a superconducting NbTiN-HEB mixer.
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