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Title: Picosecond x-ray strain rosette reveals direct laser excitation of coherent transverse acoustic phonons

Abstract

Using a strain-rosette, we demonstrate the existence of transverse strain using time-resolved x-ray diffraction from multiple Bragg reflections in laser-excited bulk gallium arsenide. We find that anisotropic strain is responsible for a considerable fraction of the total lattice motion at early times before thermal equilibrium is achieved. Our measurements are described by a new model where the Poisson ratio drives transverse motion, resulting in the creation of shear waves without the need for an indirect process such as mode conversion at an interface. Finally, using the same excitation geometry with the narrow-gap semiconductor indium antimonide, we detected coherent transverse acoustic oscillations at frequencies of several GHz.

Authors:
 [1];  [2];  [2];  [3];  [2]
  1. Korea Research Inst. of Standards and Science (KRISS), Daejeon (Korea)
  2. DePaul Univ., Chicago, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1258618
Alternate Identifier(s):
OSTI ID: 1339951
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Lee, Sooheyong, Williams, G. Jackson, Campana, Maria I., Walko, Donald A., and Landahl, Eric C. Picosecond x-ray strain rosette reveals direct laser excitation of coherent transverse acoustic phonons. United States: N. p., 2016. Web. doi:10.1038/srep19140.
Lee, Sooheyong, Williams, G. Jackson, Campana, Maria I., Walko, Donald A., & Landahl, Eric C. Picosecond x-ray strain rosette reveals direct laser excitation of coherent transverse acoustic phonons. United States. doi:10.1038/srep19140.
Lee, Sooheyong, Williams, G. Jackson, Campana, Maria I., Walko, Donald A., and Landahl, Eric C. Mon . "Picosecond x-ray strain rosette reveals direct laser excitation of coherent transverse acoustic phonons". United States. doi:10.1038/srep19140. https://www.osti.gov/servlets/purl/1258618.
@article{osti_1258618,
title = {Picosecond x-ray strain rosette reveals direct laser excitation of coherent transverse acoustic phonons},
author = {Lee, Sooheyong and Williams, G. Jackson and Campana, Maria I. and Walko, Donald A. and Landahl, Eric C.},
abstractNote = {Using a strain-rosette, we demonstrate the existence of transverse strain using time-resolved x-ray diffraction from multiple Bragg reflections in laser-excited bulk gallium arsenide. We find that anisotropic strain is responsible for a considerable fraction of the total lattice motion at early times before thermal equilibrium is achieved. Our measurements are described by a new model where the Poisson ratio drives transverse motion, resulting in the creation of shear waves without the need for an indirect process such as mode conversion at an interface. Finally, using the same excitation geometry with the narrow-gap semiconductor indium antimonide, we detected coherent transverse acoustic oscillations at frequencies of several GHz.},
doi = {10.1038/srep19140},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = {2016},
month = {1}
}

Journal Article:
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Cited by: 2 works
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