Polarization Switching in Ferroelectric Thin Films Studied by Optical Second Harmonic Generation

Мишина, Е. Д.; Sherstyuk, N. É.; Golovko, Yu. I.; Muhortov, Vladimir; Сигов, А. С.

doi:10.1080/10584580701746913

Cited by 5 publications

(3 citation statements)

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“…As a result, we have two solutions ( ) Q t and ( ) Q t . SHG field 2 ( ) E t is proportional to the dielectric polarization ( ) P t [23,24] that is…”

Section: Discussionmentioning

confidence: 99%

Polarization switching in ferroelectric thin film induced by a single-period terahertz pulse

et al. 2018

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We report here an experimental study of ultrafast response of the dielectric polarization in (Ba0.8Sr0.2)TiO3 thin films to a strong electric field of a nearly single-cycle THz pulse. The phenomenon of Second Harmonic Generation (SHG) is used as a probe of the polarization in the terahertz pump-optical probe experiment. SHG loops for THz pulses of different amplitudes were obtained. The SHG response is modelled assuming that the ferroelectric material is split into 180-degree domains. It is shown that intuitive model based on forced harmonic oscillator does not fully describe to the observed ultrafast ferroelectric response

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“…As a result, we have two solutions ( ) Q t and ( ) Q t . SHG field 2 ( ) E t is proportional to the dielectric polarization ( ) P t [23,24] that is…”

Section: Discussionmentioning

confidence: 99%

Polarization switching in ferroelectric thin film induced by a single-period terahertz pulse

et al. 2018

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“…We also compared the data with loops obtained by measuring the SHG signal in an electric field which varies with the frequency of 100 Hz. To deduce the loops we employed the procedure of reconstruction of the electric polarization as described previously 28 . It is based on the dependence of SHG intensity on ferroelectric polarization: where is the incoherent component of the unswitchable part of the second harmonic signal; P(E Ω ) is the ferroelectric (switchable) polarization, which depends on the electric field of the THz pulse; P 0 is remanent polarization i.e.…”

Section: Resultsmentioning

confidence: 99%

THz Electric Field-Induced Second Harmonic Generation in Inorganic Ferroelectric

Grishunin

Ilyin

Sherstyuk

et al. 2017

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Second Harmonic Generation induced by the electric field of a strong nearly single-cycle terahertz pulse with the peak amplitude of 300 kV/cm is studied in a classical inorganic ferroelectric thin film of (Ba0.8Sr0.2)TiO3. The dependences of the SHG intensity on the polarization of the incoming light is revealed and interpreted in terms of electric polarization induced in the plane of the film. As the THz pulse pumps the medium in the range of phononic excitations, the induced polarization is explained as a dynamical change of the ferrolectric order parameter. It is estimated that under action of the THz pulse the ferroelectric order parameter acquires an in-plane component up to 6% of the net polarization.

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“…SHG field E 2x ðtÞ is proportional to the dielectric polarization PðtÞ [28,29] that based on Eq. 2is…”

Section: Discussionmentioning

confidence: 99%

Ultrafast polarization switching of (BaSr)TiO₃ thin film by a single-period terahertz pulse in a vicinity of phase transition

et al. 2018

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Polarization Switching in Ferroelectric Thin Films Studied by Optical Second Harmonic Generation

Cited by 5 publications

References 15 publications

Polarization switching in ferroelectric thin film induced by a single-period terahertz pulse

Polarization switching in ferroelectric thin film induced by a single-period terahertz pulse

THz Electric Field-Induced Second Harmonic Generation in Inorganic Ferroelectric

Ultrafast polarization switching of (BaSr)TiO₃ thin film by a single-period terahertz pulse in a vicinity of phase transition

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Polarization Switching in Ferroelectric Thin Films Studied by Optical Second Harmonic Generation

Cited by 5 publications

References 15 publications

Polarization switching in ferroelectric thin film induced by a single-period terahertz pulse

Polarization switching in ferroelectric thin film induced by a single-period terahertz pulse

THz Electric Field-Induced Second Harmonic Generation in Inorganic Ferroelectric

Ultrafast polarization switching of (BaSr)TiO3 thin film by a single-period terahertz pulse in a vicinity of phase transition

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Ultrafast polarization switching of (BaSr)TiO₃ thin film by a single-period terahertz pulse in a vicinity of phase transition