Thermal transport in nanoporous holey silicon membranes investigated with optically induced transient thermal gratings
Abstract
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.
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.Attached Files
Published - 1.5141804
Submitted - 1912.06211.pdf
Supplemental Material - holey_si_sm_jap_postappeal.pdf
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Additional details
- Eprint ID
- 107154
- Resolver ID
- CaltechAUTHORS:20201217-111500137
- EFMA-1542864
- NSF
- DE-SC0001299
- Department of Energy (DOE)
- Generalitat de Catalunya
- SEV-2017-0706
- Agencia Estatal de Investigación
- PGC2018-101743-B-100
- Ministerio de Ciencia e Innovación (MCINN)
- 2017SGR806
- Agència de Gestió d'Ajuts Universitaris i de Recerca
- 2016-05156
- Vinnova
- 2018.0194
- Knut and Alice Wallenberg Foundation
- LCF/PR/MIT18/11830008
- La Caixa Foundation
- Created
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2020-12-17Created from EPrint's datestamp field
- Updated
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2022-02-02Created from EPrint's last_modified field