Nanoscale thermal transport and phonon dynamics in ultra-thin Si based nanostructures

M R Wagner, E Chavez-Angel, J Gomis-Bresco, J S Reparaz, Andrey Shchepetov, Mika Prunnila, Jouni Ahopelto, F Alzina, C M Sotomayor-Torres

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

We study the dynamics of acoustic phonons in ultra-thin free-standing silicon membranes both experimentally and theoretically. We discuss the impact of the lifetimes of the acoustic phonons on the thermal transport properties of the membranes with thicknesses ranging from 8 nm to 1.5 µm. The phonon lifetimes are determined by measuring the dynamic variation of the reflectivity using ultra-fast pump-probe spectroscopy. This is achieved by asynchronous optical sampling (ASOPS) of two actively coupled femto-second laser oscillators. The coherent acoustic phonon lifetime is obtained from the dynamical variations of the reflectivity with a sensitivity of 10-5 and a time resolution of about 50 fs. The experimental results are compared to theoretical calculations considering both intrinsic and extrinsic relaxation scattering processes
Original languageEnglish
Title of host publicationProceedings
Subtitle of host publication19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013
PublisherInstitute of Electrical and Electronic Engineers IEEE
Pages10-12
ISBN (Electronic)978-1-4799-2272-7
ISBN (Print)978-1-4799-2271-0
DOIs
Publication statusPublished - 2013
MoE publication typeNot Eligible
Event19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013 - Berlin, Germany
Duration: 25 Sep 201327 Sep 2013
Conference number: 19

Conference

Conference19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013
Abbreviated titleTHERMINIC 2013
CountryGermany
CityBerlin
Period25/09/1327/09/13

Fingerprint

life (durability)
acoustics
phonons
membranes
reflectance
transport properties
sampling
oscillators
pumps
probes
sensitivity
silicon
scattering
spectroscopy
lasers

Cite this

Wagner, M. R., Chavez-Angel, E., Gomis-Bresco, J., Reparaz, J. S., Shchepetov, A., Prunnila, M., ... Sotomayor-Torres, C. M. (2013). Nanoscale thermal transport and phonon dynamics in ultra-thin Si based nanostructures. In Proceedings: 19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013 (pp. 10-12). Institute of Electrical and Electronic Engineers IEEE. https://doi.org/10.1109/THERMINIC.2013.6675218
Wagner, M R ; Chavez-Angel, E ; Gomis-Bresco, J ; Reparaz, J S ; Shchepetov, Andrey ; Prunnila, Mika ; Ahopelto, Jouni ; Alzina, F ; Sotomayor-Torres, C M. / Nanoscale thermal transport and phonon dynamics in ultra-thin Si based nanostructures. Proceedings: 19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013. Institute of Electrical and Electronic Engineers IEEE, 2013. pp. 10-12
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abstract = "We study the dynamics of acoustic phonons in ultra-thin free-standing silicon membranes both experimentally and theoretically. We discuss the impact of the lifetimes of the acoustic phonons on the thermal transport properties of the membranes with thicknesses ranging from 8 nm to 1.5 µm. The phonon lifetimes are determined by measuring the dynamic variation of the reflectivity using ultra-fast pump-probe spectroscopy. This is achieved by asynchronous optical sampling (ASOPS) of two actively coupled femto-second laser oscillators. The coherent acoustic phonon lifetime is obtained from the dynamical variations of the reflectivity with a sensitivity of 10-5 and a time resolution of about 50 fs. The experimental results are compared to theoretical calculations considering both intrinsic and extrinsic relaxation scattering processes",
author = "Wagner, {M R} and E Chavez-Angel and J Gomis-Bresco and Reparaz, {J S} and Andrey Shchepetov and Mika Prunnila and Jouni Ahopelto and F Alzina and Sotomayor-Torres, {C M}",
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Wagner, MR, Chavez-Angel, E, Gomis-Bresco, J, Reparaz, JS, Shchepetov, A, Prunnila, M, Ahopelto, J, Alzina, F & Sotomayor-Torres, CM 2013, Nanoscale thermal transport and phonon dynamics in ultra-thin Si based nanostructures. in Proceedings: 19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013. Institute of Electrical and Electronic Engineers IEEE, pp. 10-12, 19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013, Berlin, Germany, 25/09/13. https://doi.org/10.1109/THERMINIC.2013.6675218

Nanoscale thermal transport and phonon dynamics in ultra-thin Si based nanostructures. / Wagner, M R; Chavez-Angel, E; Gomis-Bresco, J; Reparaz, J S; Shchepetov, Andrey; Prunnila, Mika; Ahopelto, Jouni; Alzina, F; Sotomayor-Torres, C M.

Proceedings: 19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013. Institute of Electrical and Electronic Engineers IEEE, 2013. p. 10-12.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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T1 - Nanoscale thermal transport and phonon dynamics in ultra-thin Si based nanostructures

AU - Wagner, M R

AU - Chavez-Angel, E

AU - Gomis-Bresco, J

AU - Reparaz, J S

AU - Shchepetov, Andrey

AU - Prunnila, Mika

AU - Ahopelto, Jouni

AU - Alzina, F

AU - Sotomayor-Torres, C M

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N2 - We study the dynamics of acoustic phonons in ultra-thin free-standing silicon membranes both experimentally and theoretically. We discuss the impact of the lifetimes of the acoustic phonons on the thermal transport properties of the membranes with thicknesses ranging from 8 nm to 1.5 µm. The phonon lifetimes are determined by measuring the dynamic variation of the reflectivity using ultra-fast pump-probe spectroscopy. This is achieved by asynchronous optical sampling (ASOPS) of two actively coupled femto-second laser oscillators. The coherent acoustic phonon lifetime is obtained from the dynamical variations of the reflectivity with a sensitivity of 10-5 and a time resolution of about 50 fs. The experimental results are compared to theoretical calculations considering both intrinsic and extrinsic relaxation scattering processes

AB - We study the dynamics of acoustic phonons in ultra-thin free-standing silicon membranes both experimentally and theoretically. We discuss the impact of the lifetimes of the acoustic phonons on the thermal transport properties of the membranes with thicknesses ranging from 8 nm to 1.5 µm. The phonon lifetimes are determined by measuring the dynamic variation of the reflectivity using ultra-fast pump-probe spectroscopy. This is achieved by asynchronous optical sampling (ASOPS) of two actively coupled femto-second laser oscillators. The coherent acoustic phonon lifetime is obtained from the dynamical variations of the reflectivity with a sensitivity of 10-5 and a time resolution of about 50 fs. The experimental results are compared to theoretical calculations considering both intrinsic and extrinsic relaxation scattering processes

U2 - 10.1109/THERMINIC.2013.6675218

DO - 10.1109/THERMINIC.2013.6675218

M3 - Conference article in proceedings

SN - 978-1-4799-2271-0

SP - 10

EP - 12

BT - Proceedings

PB - Institute of Electrical and Electronic Engineers IEEE

ER -

Wagner MR, Chavez-Angel E, Gomis-Bresco J, Reparaz JS, Shchepetov A, Prunnila M et al. Nanoscale thermal transport and phonon dynamics in ultra-thin Si based nanostructures. In Proceedings: 19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013. Institute of Electrical and Electronic Engineers IEEE. 2013. p. 10-12 https://doi.org/10.1109/THERMINIC.2013.6675218