Stimulated Rayleigh Scattering Enhanced by a Longitudinal Plasma Mode in a Periodically Driven Dirac Semimetal Cd3As2
Using broadband (12–45 THz) multi-terahertz spectroscopy, we show that stimulated Rayleigh scattering dominates the transient optical conductivity of cadmium arsenide, a Dirac semimetal, under an optical driving field at 30 THz. Here, the characteristic dispersive line shape with net optical gain is...
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| Veröffentlicht in: | Physical review letters 2022-11, Vol.129 (20) |
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| container_title | Physical review letters |
| container_volume | 129 |
| creator | Murotani, Yuta Kanda, Natsuki Ikeda, Tatsuhiko N. Matsuda, Takuya Goyal, Manik Yoshinobu, Jun Kobayashi, Yohei Stemmer, Susanne Matsunaga, Ryusuke |
| description | Using broadband (12–45 THz) multi-terahertz spectroscopy, we show that stimulated Rayleigh scattering dominates the transient optical conductivity of cadmium arsenide, a Dirac semimetal, under an optical driving field at 30 THz. Here, the characteristic dispersive line shape with net optical gain is accounted for by optical transitions between light-induced Floquet subbands, strikingly enhanced by the longitudinal plasma mode. Stimulated Rayleigh scattering with an unprecedentedly large refractive index change may pave the way for slow light generation in conductive solids at room temperature. |
| doi_str_mv | 10.1103/PhysRevLett.129.207402 |
| format | Article |
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| language | eng |
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| source | American Physical Society Journals; EZB-FREE-00999 freely available EZB journals |
| subjects | Coherent control CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Dirac semimetal Floquet systems Optical & microwave phenomena Photoexcitation Photoinduced effect Rayleigh scattering Terahertz spectroscopy |
| title | Stimulated Rayleigh Scattering Enhanced by a Longitudinal Plasma Mode in a Periodically Driven Dirac Semimetal Cd3As2 |
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