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Thermal transport in nanoporous holey silicon membranes investigated with optically induced transient thermal gratings

Duncan, Ryan A. and Romano, Giuseppe and Sledzinska, Marianna and Maznev, Alexei A. and Péraud, Jean-Philippe M. and Hellman, Olle and Sotomayor Torres, Clivia M. and Nelson, Keith A. (2020) Thermal transport in nanoporous holey silicon membranes investigated with optically induced transient thermal gratings. Journal of Applied Physics, 128 (23). Art. No. 235106. ISSN 0021-8979.

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In this study, we use transient thermal gratings—a non-contact, laser-based thermal metrology technique with intrinsically high accuracy—to investigate room-temperature phonon-mediated thermal transport in two nanoporous holey silicon membranes with limiting dimensions of 120 nm and 250 nm, respectively. We compare the experimental results with ab initio calculations of phonon-mediated thermal transport according to the phonon Boltzmann transport equation (BTE) using two different computational techniques. We find that the calculations conducted within the Casimir framework, i.e., based on the BTE with the bulk phonon dispersion and diffuse scattering from surfaces, are in quantitative agreement with the experimental data and thus conclude that this framework is adequate for describing phonon-mediated thermal transport in silicon nanostructures with feature sizes of the order of 100 nm.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Duncan, Ryan A.0000-0003-2831-8099
Sledzinska, Marianna0000-0001-8592-1121
Hellman, Olle0000-0002-3453-2975
Sotomayor Torres, Clivia M.0000-0001-9986-2716
Nelson, Keith A.0000-0001-7804-5418
Additional Information:© 2020 Author(s). Published under license by AIP Publishing. Submitted: 7 December 2019 · Accepted: 2 December 2020 · Published Online: 17 December 2020. We would like to thank Charles Shi and Jonas Rajagopal for assisting with the TTG measurements. R.A.D. and K.A.N. acknowledge support from the NSF EFRI 2-DARE (Grant No. EFMA-1542864). A.A.M. and K.A.N. acknowledge support by the Solid State Solar-Thermal Energy Conversion Center (S3TEC), an Energy Frontier Research Center funded by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Science, under Award No. DE-SC0001299. The ICN2 is funded by the CERCA program/Generalitat de Catalunya and supported by the Severo Ochoa Centres of Excellence program, funded by the Spanish Research Agency (AEI, Grant No. SEV-2017-0706). M.S. and C.M.S.T. acknowledge support from the Spanish National Project SIP (No. PGC2018-101743-B-100) and from AGAUR (Grant No. 2017SGR806). O.H. gratefully acknowledges financial support from the VINN Excellence Center for Functional Nanoscale Materials (FunMat-2) (Grant No. 2016-05156) and the Knut and Alice Wallenberg Foundation through Wallenberg Scholar (Grant No. 2018.0194). This work has been partly supported by the La Caixa Foundation MISTI Global Seed Fund program (No. LCF/PR/MIT18/11830008). DATA AVAILABILITY. The data that support the findings of this study are available from the corresponding author upon reasonable request.
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0001299
Generalitat de CatalunyaUNSPECIFIED
Agencia Estatal de InvestigaciónSEV-2017-0706
Ministerio de Ciencia e Innovación (MCINN)PGC2018-101743-B-100
Agència de Gestió d'Ajuts Universitaris i de Recerca2017SGR806
Knut and Alice Wallenberg Foundation2018.0194
La Caixa FoundationLCF/PR/MIT18/11830008
Issue or Number:23
Record Number:CaltechAUTHORS:20201217-111500137
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107154
Deposited By: George Porter
Deposited On:17 Dec 2020 20:14
Last Modified:17 Dec 2020 20:14

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