气候变化领域集成服务门户(CCPortal): Parametric amplification of optical phonons

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DOI	10.1073/pnas.1809725115
	Parametric amplification of optical phonons
	Cartella A.; Nova T.F.; Fechner M.; Merlin R.; Cavalleri A.
发表日期	2018
ISSN	0027-8424
起始页码	12148
结束页码	12151
卷号	115 期号:48
英文摘要	We use coherent midinfrared optical pulses to resonantly excite large-amplitude oscillations of the Si–C stretching mode in silicon carbide. When probing the sample with a second pulse, we observe parametric optical gain at all wavelengths throughout the reststrahlen band. This effect reflects the amplification of light by phonon-mediated four-wave mixing and, by extension, of optical-phonon fluctuations. Density functional theory calculations clarify aspects of the microscopic mechanism for this phenomenon. The high-frequency dielectric permittivity and the phonon oscillator strength depend quadratically on the lattice coordinate; they oscillate at twice the frequency of the optical field and provide a parametric drive for the lattice mode. Parametric gain in phononic four-wave mixing is a generic mechanism that can be extended to all polar modes of solids, as a means to control the kinetics of phase transitions, to amplify many-body interactions or to control phonon-polariton waves. © 2018 National Academy of Sciences. All Rights Reserved.
英文关键词	Phonon amplification; Silicon carbide; Ultrafast spectroscopy
语种	英语
scopus关键词	Article; density functional theory; dielectric constant; electromagnetic radiation; kinetics; microscopy; nonlinear system; phase transition; phonon; physical parameters; polarization; priority journal; stimulation
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160444
作者单位	Cartella, A., Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, 22761, Germany; Nova, T.F., Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, 22761, Germany, Hamburg Centre for Ultrafast Imaging, University of Hamburg, Hamburg, 22761, Germany; Fechner, M., Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, 22761, Germany; Merlin, R., Department of Physics, University of Michigan, Ann Arbor, MI 48109-1040, United States; Cavalleri, A., Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, 22761, Germany, Hamburg Centre for Ultrafast Imaging, University of Hamburg, Hamburg, 22761, Germany, Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, OX1 3PU, United Kingdom
推荐引用方式 GB/T 7714	Cartella A.,Nova T.F.,Fechner M.,et al. Parametric amplification of optical phonons[J],2018,115(48).
APA	Cartella A.,Nova T.F.,Fechner M.,Merlin R.,&Cavalleri A..(2018).Parametric amplification of optical phonons.Proceedings of the National Academy of Sciences of the United States of America,115(48).
MLA	Cartella A.,et al."Parametric amplification of optical phonons".Proceedings of the National Academy of Sciences of the United States of America 115.48(2018).