Ultrafast optical excitation of a combined coherent-squeezed phonon field in SrTiO3

Garrett, Gregory ; Whitaker, John ; Sood, Ajay ; Merlin, Roberto (1997) Ultrafast optical excitation of a combined coherent-squeezed phonon field in SrTiO3 Optics Express, 1 (12). pp. 385-389. ISSN 1094-4087

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Official URL: http://www.opticsinfobase.org/oe/abstract.cfm?URI=...

Related URL: http://dx.doi.org/10.1364/OE.1.000385

Abstract

We have simultaneously excited a coherent and a squeezed phonon field in SrTiO3 using femtosecond laser pulses and stimulated Raman scattering. The frequency of the coherent state (~1.3 THz) is that of the A1g-component of the soft mode responsible for the cubic-tetragonal phase transformation at ≈ 110 K. The squeezed field involves a continuum of transverse acoustic phonons dominated by a narrow peak in the density of states at ~ 6.9 THz.

Item Type:Article
Source:Copyright of this article belongs to Optical Society of America.
ID Code:50281
Deposited On:22 Jul 2011 13:49
Last Modified:18 May 2016 04:38

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