The extremely early stage of the ferroelectric B 2 soft mode of KDP studied by the impulsive stimulated Raman scattering

Jun Kano; Yuhji Tsujimi; Keith A. Nelson; Toshirou Yagi

doi:10.1080/00150190390205898

The extremely early stage of the ferroelectric B ₂ soft mode of KDP studied by the impulsive stimulated Raman scattering

Jun Kano, Yuhji Tsujimi, Keith A. Nelson, Toshirou Yagi

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

It has been reported that the ferroelectric B 2 soft mode of KDP in time-domain was observed directly by the impulsive stimulated Raman scattering with a heterodyne detection method (HD-ISRS). With 80 femtosecond laser pulses, the initial process in the extremely early stage of the B 2 mode excitation observed for the first time in time-domain. The signals are analyzed using the modified Debye model (MDM) which gives phenomenologically the initial process of the Debye model. MDM produces a poor fit to the initial process of the B 2 mode in contrast to the good fit to its relaxation process. This indicates that a new model to describe a whole time dependence of the B 2 mode is needed.

Original language	English
Pages (from-to)	59-66
Number of pages	8
Journal	Ferroelectrics
Volume	285
DOIs	https://doi.org/10.1080/00150190390205898
Publication status	Published - Jun 1 2003
Externally published	Yes

Keywords

Debye model
Heterodyne detection
Impulsive stimulated Raman scattering
Initial process
KDP
Phase transition
Soft mode

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1080/00150190390205898

Cite this

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title = "The extremely early stage of the ferroelectric B 2 soft mode of KDP studied by the impulsive stimulated Raman scattering",

abstract = "It has been reported that the ferroelectric B 2 soft mode of KDP in time-domain was observed directly by the impulsive stimulated Raman scattering with a heterodyne detection method (HD-ISRS). With 80 femtosecond laser pulses, the initial process in the extremely early stage of the B 2 mode excitation observed for the first time in time-domain. The signals are analyzed using the modified Debye model (MDM) which gives phenomenologically the initial process of the Debye model. MDM produces a poor fit to the initial process of the B 2 mode in contrast to the good fit to its relaxation process. This indicates that a new model to describe a whole time dependence of the B 2 mode is needed.",

keywords = "Debye model, Heterodyne detection, Impulsive stimulated Raman scattering, Initial process, KDP, Phase transition, Soft mode",

author = "Jun Kano and Yuhji Tsujimi and Nelson, {Keith A.} and Toshirou Yagi",

note = "Funding Information: The present study has been supported partially by the Grant-in-Aid for Scientific Research (A) and (B) from Japan Society for the Promotion of Science, No. 14204029 and No. 10044050, respectively, and by U. S. NSF Grants No. DMR-9710140 and Int-9418058.",

year = "2003",

month = jun,

day = "1",

doi = "10.1080/00150190390205898",

language = "English",

volume = "285",

pages = "59--66",

journal = "Ferroelectrics",

issn = "0015-0193",

publisher = "Taylor and Francis Ltd.",

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T1 - The extremely early stage of the ferroelectric B 2 soft mode of KDP studied by the impulsive stimulated Raman scattering

AU - Kano, Jun

AU - Tsujimi, Yuhji

AU - Nelson, Keith A.

AU - Yagi, Toshirou

N1 - Funding Information: The present study has been supported partially by the Grant-in-Aid for Scientific Research (A) and (B) from Japan Society for the Promotion of Science, No. 14204029 and No. 10044050, respectively, and by U. S. NSF Grants No. DMR-9710140 and Int-9418058.

PY - 2003/6/1

Y1 - 2003/6/1

N2 - It has been reported that the ferroelectric B 2 soft mode of KDP in time-domain was observed directly by the impulsive stimulated Raman scattering with a heterodyne detection method (HD-ISRS). With 80 femtosecond laser pulses, the initial process in the extremely early stage of the B 2 mode excitation observed for the first time in time-domain. The signals are analyzed using the modified Debye model (MDM) which gives phenomenologically the initial process of the Debye model. MDM produces a poor fit to the initial process of the B 2 mode in contrast to the good fit to its relaxation process. This indicates that a new model to describe a whole time dependence of the B 2 mode is needed.

AB - It has been reported that the ferroelectric B 2 soft mode of KDP in time-domain was observed directly by the impulsive stimulated Raman scattering with a heterodyne detection method (HD-ISRS). With 80 femtosecond laser pulses, the initial process in the extremely early stage of the B 2 mode excitation observed for the first time in time-domain. The signals are analyzed using the modified Debye model (MDM) which gives phenomenologically the initial process of the Debye model. MDM produces a poor fit to the initial process of the B 2 mode in contrast to the good fit to its relaxation process. This indicates that a new model to describe a whole time dependence of the B 2 mode is needed.

KW - Debye model

KW - Heterodyne detection

KW - Impulsive stimulated Raman scattering

KW - Initial process

KW - KDP

KW - Phase transition

KW - Soft mode

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DO - 10.1080/00150190390205898

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JO - Ferroelectrics

JF - Ferroelectrics

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