会議発表論文

会議発表論文

Vacuum Bloch-Siegert Shift in Cyclotron Resonance

IEEE

英語

2018-09-13

https://doi.org/10.1109/IRMMW-THz.2018.8510512

M. Bamba, X. Li and J. Kono, "Vacuum Bloch-Siegert Shift in Cyclotron Resonance," 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Nagoya, 2018, pp. 1-3.

In a two-dimensional electron gas (2DEG) inside a terahertz (THz) cavity in a perpendicular magnetic field, we observed a clear resonance-frequency shift originating from the counter-rotating coupling between the electrons' cyclotron resonance and THz cavity modes. This shift can be understood as a vacuum Bloch-Siegert shift, arising from the ultrastrong counter-rotating coupling between the cyclotron-orbiting 2DEG and the vacuum fluctuations of the THz cavity modes. While such a shift has been difficult to observe clearly and is usually neglected under the rotating-wave approximation, here an unambiguous observation was made possible by the broken time-reversal symmetry of the 2DEG in a magnetic field and the use of an ultrahigh-mobility 2DEG, a high-quality-factor cavity, and circularly polarized THz radiation.

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Vacuum Bloch-Siegert Shift in Cyclotron Resonance

IEEE

英語

2018-09-13

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https://doi.org/10.1109/IRMMW-THz.2018.8510512

https://hdl.handle.net/11094/70651