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Terahertz ionic Ker...
Terahertz ionic Kerr effect : Two-phonon contribution to the nonlinear optical response in insulators
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- Basini, Martina, 1985- (författare)
- Stockholms universitet,Fysikum
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Udina, M. (författare)
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Pancaldi, M. (författare)
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- Unikandanunni, Vivek, 1993- (författare)
- Stockholms universitet,Fysikum
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- Bonetti, Stefano, 1982- (författare)
- Stockholms universitet,Fysikum,Ca’ Foscari University of Venice, Italy
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Benfatto, L. (författare)
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(creator_code:org_t)
- 2024
- 2024
- Engelska.
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Ingår i: Physical Review B. - 2469-9950 .- 2469-9969. ; 109:2
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The THz Kerr effect measures the birefringence induced in an otherwise isotropic material by a strong THz pulse driving the Raman-active excitations of the systems. Here we provide experimental evidence of a sizable Kerr response in insulating SrTiO3 due to infrared-active lattice vibrations. Such a signal, named the ionic Kerr effect, is associated with the simultaneous excitation of multiple phonons. Thanks to a theoretical modeling of the time, polarization, and temperature dependence of the birefrengence, we can disentangle the ionic Kerr effect from the off-resonant electronic excitations, providing an alternative tunable mechanism to modulate the refractive index on ultrashort timescales via infrared active phonons.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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