| Project/Area Number |
15K13496
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics I
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
Ikushima Kenji 東京農工大学, 工学(系)研究科(研究院), 准教授 (20334302)
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| Co-Investigator(Renkei-kenkyūsha) |
KOMIYAMA Susumu 東京大学, 大学院総合文化研究科, 名誉教授 (00153677)
KIM Sonmi 東京大学, 生産技術研究所, 特任助教 (90585697)
HOSAKO Iwao 国立研究開発法人情報通信研究機構, 未来ICT研究所, 研究所長 (00359069)
Patrashin Mikhail 国立研究開発法人情報通信研究機構, 未来ICT研究所, 研究員 (90794595)
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| Research Collaborator |
KOBAYASHI Takashi
YAMANAMI Hiroki
NAKAGAWA Daisuke
NISHIMURA Akira
TAKIZAWA Kazuhiro
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | グラフェン / 量子ホール効果 / テラヘルツ |
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| Outline of Final Research Achievements |
The purpose of this work is to observe current-induced Landau-level (LL) emission in graphene. First, we studied photoresponse of ultra-highly sensitive infrared phototransistor based on multi-quantum wells under magnetic field, and determined proper operation conditions of the infrared phototransistor. Next, we fabricated a monolayer graphene with a bow-tie antenna and set up a THz optical system in a cooled radiation shield box. We confirm the current-induced THz emission from graphene with a wavelength corresponding to energy spacing between the N=0 and N=+1 LL in monolayer graphene. Furthermore, we observe the enhancement of emissivity when the Fermi level is positioned between N=0 and N=+1 LL. These results strongly indicate that the N=+1 -> N=0 LL radiative transition in monolayer graphene.
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