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Terahertz-driven ph...
Terahertz-driven phonon upconversion in SrTiO3
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Kozina, M. (author)
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Fechner, M. (author)
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Marsik, P. (author)
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van Driel, T. (author)
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Glownia, J. M. (author)
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Bernhard, C. (author)
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Radovic, M. (author)
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Zhu, D. (author)
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- Bonetti, Stefano (author)
- Stockholms universitet,Fysikum
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Staub, U. (author)
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Hoffmann, M. C. (author)
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(creator_code:org_t)
- 2019-01-21
- 2019
- English.
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In: Nature Physics. - : Springer Science and Business Media LLC. - 1745-2473 .- 1745-2481. ; 15:4, s. 387-
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Abstract
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- Direct manipulation of the atomic lattice using intense long-wavelength laser pulses has become a viable approach to create new states of matter in complex materials. Conventionally, a high-frequency vibrational mode is driven resonantly by a mid-infrared laser pulse and the lattice structure is modified through indirect coupling of this infrared-active phonon to other, lower-frequency lattice modulations. Here, we drive the lowest-frequency optical phonon in the prototypical transition metal oxide SrTiO3 well into the anharmonic regime with an intense terahertz field. We show that it is possible to transfer energy to higher-frequency phonon modes through nonlinear coupling. Our observations are carried out by directly mapping the lattice response to the coherent drive field with femtosecond X-ray pulses, enabling direct visualization of the atomic displacements.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Kozina, M.
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Fechner, M.
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Marsik, P.
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van Driel, T.
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Glownia, J. M.
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Bernhard, C.
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show more...
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Radovic, M.
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Zhu, D.
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Bonetti, Stefano
-
Staub, U.
-
Hoffmann, M. C.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
- Articles in the publication
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Nature Physics
- By the university
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Stockholm University