dc.contributor.author | Johnson, Jeremiah A. | |
dc.contributor.author | Maznev, Alexei | |
dc.contributor.author | Eliason, Jeffrey Kristian | |
dc.contributor.author | Nelson, Keith Adam | |
dc.contributor.author | Cuffe, John | |
dc.contributor.author | Minnich, Austin Jerome | |
dc.contributor.author | Kehoe, Timothy | |
dc.contributor.author | Torres, Clivia M. Sotomayor | |
dc.contributor.author | Chen, Gang | |
dc.date.accessioned | 2013-02-20T20:50:45Z | |
dc.date.available | 2013-02-20T20:50:45Z | |
dc.date.issued | 2013-01 | |
dc.date.submitted | 2012-04 | |
dc.identifier.issn | 0031-9007 | |
dc.identifier.issn | 1079-7114 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/77165 | |
dc.description.abstract | The “textbook” phonon mean free path of heat carrying phonons in silicon at room temperature is ∼40 nm. However, a large contribution to the thermal conductivity comes from low-frequency phonons with much longer mean free paths. We present a simple experiment demonstrating that room-temperature thermal transport in Si significantly deviates from the diffusion model already at micron distances. Absorption of crossed laser pulses in a freestanding silicon membrane sets up a sinusoidal temperature profile that is monitored via diffraction of a probe laser beam. By changing the period of the thermal grating we vary the heat transport distance within the range ∼1–10 μm. At small distances, we observe a reduction in the effective thermal conductivity indicating a transition from the diffusive to the ballistic transport regime for the low-frequency part of the phonon spectrum. | en_US |
dc.description.sponsorship | United States. Dept. of Energy. Office of Science (Award DE-SC0001299) | en_US |
dc.description.sponsorship | United States. Dept. of Energy. Office of Science (Award DE-FG02-09ER46577) | en_US |
dc.language.iso | en_US | |
dc.publisher | American Physical Society | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1103/PhysRevLett.110.025901 | en_US |
dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
dc.source | APS | en_US |
dc.title | Direct Measurement of Room-Temperature Nondiffusive Thermal Transport Over Micron Distances in a Silicon Membrane | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Johnson, Jeremy A. et al. “Direct Measurement of Room-Temperature Nondiffusive Thermal Transport Over Micron Distances in a Silicon Membrane.” Physical Review Letters 110.2 (2013). © 2013 American Physical Society | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Chemistry | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Mechanical Engineering | en_US |
dc.contributor.mitauthor | Johnson, Jeremiah A. | |
dc.contributor.mitauthor | Maznev, Alexei | |
dc.contributor.mitauthor | Eliason, Jeffrey Kristian | |
dc.contributor.mitauthor | Nelson, Keith Adam | |
dc.contributor.mitauthor | Minnich, Austin Jerome | |
dc.contributor.mitauthor | Chen, Gang | |
dc.relation.journal | Physical Review Letters | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Johnson, Jeremy A.; Maznev, A. A.; Cuffe, John; Eliason, Jeffrey K.; Minnich, Austin J.; Kehoe, Timothy; Torres, Clivia M. Sotomayor; Chen, Gang; Nelson, Keith A. | en |
dc.identifier.orcid | https://orcid.org/0000-0002-3968-8530 | |
dc.identifier.orcid | https://orcid.org/0000-0001-7804-5418 | |
dc.identifier.orcid | https://orcid.org/0000-0001-9157-6491 | |
dspace.mitauthor.error | true | |
mit.license | PUBLISHER_POLICY | en_US |
mit.metadata.status | Complete | |