Direct observation of current-injected Landau-level emission in graphene
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 |
Research Field |
Condensed matter physics I
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Research Institution | Tokyo University of Agriculture and Technology |
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 |
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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Report
(3 results)
Research Products
(12 results)
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[Presentation] Magnetic sensing by ultrasonic excitation2015
Author(s)
K. Ikushima, M. Uehara, M. Kuroda, H. Yamada, Y. Kawano, Y. Suzuki and A. Kohri
Organizer
IEEE International Ultrasonics Symposium (IEEE IUS)
Place of Presentation
Taipei International Convention Center, Taipei, Taiwan
Year and Date
2015-10-23
Related Report
Int'l Joint Research
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