Anomalous polariton dynamics in LiTaO3

Gary P. Wiederrecht; Thomas P. Dougherty; Lisa Dhar; Keith A. Nelson; D. E. Leaird; A. M. Weiner

doi:10.1080/00150199308008698

Anomalous polariton dynamics in LiTaO₃

Gary P. Wiederrecht, Thomas P. Dougherty, Lisa Dhar, Keith A. Nelson, D. E. Leaird, A. M. Weiner

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

12 Scopus citations

Abstract

The techniques of single and multiple-pulse impulsive stimulated Raman scattering (ISRS) are used to explore the dynamics of the lowest frequency A1 polariton mode in the ferroelectric crystal lithium tantalate. This time-domain technique which allows unambiguous characterization of the frequency and damping dispersion of the polariton reveals anomalously high damping rates for the A1 mode. The damping behavior is explained by a model that includes coupling of the polariton to a weakly Raman-active relaxational mode and to two E-symmetry modes.

Original language	English (US)
Pages (from-to)	103-118
Number of pages	16
Journal	Ferroelectrics
Volume	150
Issue number	1
DOIs	https://doi.org/10.1080/00150199308008698
State	Published - Dec 1993
Externally published	Yes

Keywords

impulsive stimulated Raman scattering
lithium tantalate
polariton

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1080/00150199308008698

Cite this

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title = "Anomalous polariton dynamics in LiTaO3",

abstract = "The techniques of single and multiple-pulse impulsive stimulated Raman scattering (ISRS) are used to explore the dynamics of the lowest frequency A1 polariton mode in the ferroelectric crystal lithium tantalate. This time-domain technique which allows unambiguous characterization of the frequency and damping dispersion of the polariton reveals anomalously high damping rates for the A1 mode. The damping behavior is explained by a model that includes coupling of the polariton to a weakly Raman-active relaxational mode and to two E-symmetry modes.",

keywords = "impulsive stimulated Raman scattering, lithium tantalate, polariton",

author = "Wiederrecht, {Gary P.} and Dougherty, {Thomas P.} and Lisa Dhar and Nelson, {Keith A.} and Leaird, {D. E.} and Weiner, {A. M.}",

note = "Funding Information: This work was supported in part by ONR grant N00014-92-1503. One of the authors, L.D., was supported by a DoD graduate fellowship and the AT&T Bell Laboratories GRPW program.",

year = "1993",

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doi = "10.1080/00150199308008698",

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T1 - Anomalous polariton dynamics in LiTaO3

AU - Wiederrecht, Gary P.

AU - Dougherty, Thomas P.

AU - Dhar, Lisa

AU - Nelson, Keith A.

AU - Leaird, D. E.

AU - Weiner, A. M.

N1 - Funding Information: This work was supported in part by ONR grant N00014-92-1503. One of the authors, L.D., was supported by a DoD graduate fellowship and the AT&T Bell Laboratories GRPW program.

PY - 1993/12

Y1 - 1993/12

N2 - The techniques of single and multiple-pulse impulsive stimulated Raman scattering (ISRS) are used to explore the dynamics of the lowest frequency A1 polariton mode in the ferroelectric crystal lithium tantalate. This time-domain technique which allows unambiguous characterization of the frequency and damping dispersion of the polariton reveals anomalously high damping rates for the A1 mode. The damping behavior is explained by a model that includes coupling of the polariton to a weakly Raman-active relaxational mode and to two E-symmetry modes.

AB - The techniques of single and multiple-pulse impulsive stimulated Raman scattering (ISRS) are used to explore the dynamics of the lowest frequency A1 polariton mode in the ferroelectric crystal lithium tantalate. This time-domain technique which allows unambiguous characterization of the frequency and damping dispersion of the polariton reveals anomalously high damping rates for the A1 mode. The damping behavior is explained by a model that includes coupling of the polariton to a weakly Raman-active relaxational mode and to two E-symmetry modes.

KW - impulsive stimulated Raman scattering

KW - lithium tantalate

KW - polariton

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