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

M.R. Wagner; E. Chávez-Ángel; J. Gomis-Bresco; J.S. Reparaz; Andrey Shchepetov; Mika Prunnila; Jouni Ahopelto; F. Alzina; C.M. Sotomayor-Torres

doi:10.1109/THERMINIC.2013.6675218

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

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

Catalan Institute of Nanoscience and Nanotechnology (ICN2)

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-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 language	English
Title of host publication	19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013
Publisher	IEEE Institute of Electrical and Electronic Engineers
Pages	10-12
ISBN (Electronic)	978-1-4799-2272-7
ISBN (Print)	978-1-4799-2271-0
DOIs	https://doi.org/10.1109/THERMINIC.2013.6675218
Publication status	Published - 2013
MoE publication type	A4 Article in a conference publication
Event	19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013 - Berlin, Germany Duration: 25 Sept 2013 → 27 Sept 2013 Conference number: 19

Conference

Conference	19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013
Abbreviated title	THERMINIC 2013
Country/Territory	Germany
City	Berlin
Period	25/09/13 → 27/09/13

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10.1109/THERMINIC.2013.6675218

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Wagner, M. R., Chávez-Ángel, E., Gomis-Bresco, J., Reparaz, J. S., Shchepetov, A., Prunnila, M., Ahopelto, J., Alzina, F., & Sotomayor-Torres, C. M. (2013). Nanoscale thermal transport and phonon dynamics in ultra-thin Si based nanostructures. In 19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013 (pp. 10-12). IEEE Institute of Electrical and Electronic Engineers. https://doi.org/10.1109/THERMINIC.2013.6675218

@inproceedings{59b0013fe90445b49c8d36c702e7665b,

title = "Nanoscale thermal transport and phonon dynamics in ultra-thin Si based nanostructures",

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 = "M.R. Wagner and E. Ch{\'a}vez-{\'A}ngel and J. Gomis-Bresco and J.S. Reparaz and Andrey Shchepetov and Mika Prunnila and Jouni Ahopelto and F. Alzina and C.M. Sotomayor-Torres",

note = "The authors acknowledge support from the FP7 projects NANOTHERM (grant no. 318117), NANOFUNCTION (grant no. 257375) and NANOPOWER (grant no. 256959); the Spanish MICINN projects nanoTHERM (grant no. CSD2010–0044) and TAPHOR (MAT2012–31392). E. C.-A. acknowledges a Becas Chile 2010 CONICYT fellowship from Chilean government. The scientific collaborations with the group of T. Dekorsy and J. Cuffe are gratefully acknowledged.; 19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013, THERMINIC 2013 ; Conference date: 25-09-2013 Through 27-09-2013",

year = "2013",

doi = "10.1109/THERMINIC.2013.6675218",

language = "English",

isbn = "978-1-4799-2271-0",

pages = "10--12",

booktitle = "19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013",

publisher = "IEEE Institute of Electrical and Electronic Engineers",

address = "United States",

}

Wagner, MR, Chávez-Ángel, 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 19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013. IEEE Institute of Electrical and Electronic Engineers, 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.; Chávez-Ángel, E.; Gomis-Bresco, J. et al.
19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013. IEEE Institute of Electrical and Electronic Engineers, 2013. p. 10-12.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

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

AU - Wagner, M.R.

AU - Chávez-Ángel, 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.

N1 - Conference code: 19

PY - 2013

Y1 - 2013

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 - 19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013

PB - IEEE Institute of Electrical and Electronic Engineers

T2 - 19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013

Y2 - 25 September 2013 through 27 September 2013

ER -

Wagner MR, Chávez-Ángel 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 19th International Workshop on Thermal Investigations of ICs and Systems, THERMINIC 2013. IEEE Institute of Electrical and Electronic Engineers. 2013. p. 10-12 doi: 10.1109/THERMINIC.2013.6675218

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

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