Development of time resolved THz-STM
| Project/Area Number |
16H05982
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Thin film/Surface and interfacial physical properties
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| Research Institution | University of Tsukuba |
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Principal Investigator |
Yoshida Shoji 筑波大学, 数理物質系, 准教授 (90447227)
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| Project Period (FY) |
2016-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥26,260,000 (Direct Cost: ¥20,200,000、Indirect Cost: ¥6,060,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000)
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| Keywords | 走査プローブ顕微鏡 / テラヘルツ / 超高速分光 / 表面科学 / 走査トンネル顕微鏡 / 時間分解計測 / 超高速 |
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| Outline of Final Research Achievements |
In this study, we have developed a novel time-resolved microscopy - THz-STM. We have achieved time-resolved measurement with extremely high signal to noise ratio by using a highly intense and high repetition rate THz pulse, which was generated using high power femtosecond pulse laser.
We have applied the technique to probe the ultrafast dynamics of various materials. For example, we have succeeded in measuring ultrafast carrier relaxation and ultrafast metal-insulator transition in two dimensional layered materials, and we have captured electron motion in an organic semiconductor. We have demonstrated sub-ps time resolution and atomic spatial resolution of the method from the above results.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で開発した時間分解THz-STMを用いて、超高速領域での光励起キャリアダイナミクスや電子状態の変化を原子レベルで捉えることに成功した。サブps時間分解能、原子分解能を両立した時間分解計測による表面ダイナミクスのイメージングが可能となり、今後様々な試料の光応答・ダイナミクスを原子・分子のスケールで解明できるようになると期待される。
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Report
(5 results)
Research Products
(28 results)
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[Journal Article] Development of laser-combined scanning multiprobe spectroscopy and application to analysis of WSe2/MoSe2 in-plane heterostructure2019
Author(s)
Hiroyuki Mogi, Zi-Han Wang, Takafumi Banba, Yuhei Takaguchi, Naohiko Endo, Shoji Yoshida, Atsushi Taninaka, Haruhiro Oigawa, Yasumitsu Miyata, Osamu Takeuchi, and Hidemi Shigekawa
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Journal Title
Appl. Phys. Express
Volume: 12
Issue: 4
Pages: 045002-045002
DOI
NAID
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Modulation of electrical potential and conductivity in an atomic-layer semiconductor heterojunction2016
Author(s)
Y. Kobayashi, S. Yoshida, R. Sakurada, K. Takashima, T. Yamamoto, T. Saito, S. Konabe, T. Taniguchi, K. Watanabe, Y. Maniwa, O. Takeuchi, H. Shigekawa, Y. Miyata
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Journal Title
Sci. Rep.
Volume: 6
Issue: 1
Pages: 31223-31223
DOI
NAID
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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