Controlling of two-photon transition rate towards two-photon laser oscillation
| Project/Area Number |
24654132
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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 |
Atomic/Molecular/Quantum electronics
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| Research Institution | Okayama University |
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Principal Investigator |
UETAKE Satoshi 岡山大学, 自然科学研究科, 准教授 (80514778)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Keywords | 二光子放出 / マクロコヒーレント / 二光子レーザー発振 / マクロコヒーレンス / 誘導ラマン過程 / 誘導ラマン断熱励起 / 最大コヒーレンス |
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| Outline of Final Research Achievements |
In this research project, we investigate a way to enhance the two-photon emission rate by using atomic/molecular coherence. Two-photon lasing is difficult because the two-photon emission rate is very small in general. Thus a high two-photon emission rate is required in order to realize the "two-photon laser". In this research, we succeeded to observe the two-photon emission from vibrationally excited state of para hydrogen gas, whose density of 10 to the 20th per cubic centimeters. The spontaneous two-photon emission from vibrationally excited state of para-hydrogen is almost impossible because the emission rate is very small. Thus the observation of two-photon emission means that we succeeded to obtain a high rate enhancement. The enhancement factor is estimated to be 10 to the 18th. These results play an important role for future realization of a two-photon laser.
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Report
(4 results)
Research Products
(26 results)
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[Journal Article] Observation of coherent two-photon emission from the first vibrationally excited state of hydrogen molecules2014
Author(s)
Y. Miyamoto, H. Hara, S. Kuma, T. Masuda, I. Nakano, C. Ohae, N. Sasao, M Tanaka, S. Uetake, A. Yoshimi, K. Yoshimura and M. Yoshimura
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Journal Title
Prog. Theor. Exp. Phys.
Volume: 2014
Issue: 11
Pages: 1-12
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Journal Article] Neutrino Spectroscopy with Atoms and Molecules2012
Author(s)
Atsushi Fukumi, Susumu Kuma, Yuki Miyamoto, Kyo Nakajima, Itsuo Nakano, Hajime Nanjo, Chiaki Ohae, Noboru Sasao, Minoru Tanaka, Takashi Taniguchi, Satoshi Uetake, Tomonari Wakabayashi, Takuya Yamaguchi, Akihiko Yoshimi, Motohiko Yoshimura
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Journal Title
Prog. Theor. Exp. Phys
Volume: 04D002
Issue: 1
Pages: 1-79
DOI
Related Report
Peer Reviewed
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