Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft x-ray beams
Heat dissipation from a nanoscale hot-spot is expected to be non-diffusive when a hot-spot is smaller than the phonon mean free path of the substrate. Our technique of observing diffraction of coherent soft x-ray pulses allows for very high resolution (∼pm) of thermally-induced surface distortion, a...
| Main Authors: | , , , , , , |
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| Format: | Article |
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SPIE
2018
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| Online Access: | http://hdl.handle.net/1721.1/113414 https://orcid.org/0000-0001-7804-5418 |
| _version_ | 1826206041833996288 |
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| author | Siemens, Mark E. Li, Qing Yang, Ronggui Anderson, Erik H. Murnane, Margaret M. Kapteyn, Henry C. Nelson, Keith Adam |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Siemens, Mark E. Li, Qing Yang, Ronggui Anderson, Erik H. Murnane, Margaret M. Kapteyn, Henry C. Nelson, Keith Adam |
| author_sort | Siemens, Mark E. |
| collection | MIT |
| description | Heat dissipation from a nanoscale hot-spot is expected to be non-diffusive when a hot-spot is smaller than the phonon mean free path of the substrate. Our technique of observing diffraction of coherent soft x-ray pulses allows for very high resolution (∼pm) of thermally-induced surface distortion, as well as femtosecond time resolution of dynamics. We successfully model our experimental results with a diffusive transport model that is modified to include an additional boundary resistance. These results confirm the importance of considering ballistic transport away from a nanoscale heat source, and identify a means of correctly accounting for this ballistic transport. |
| first_indexed | 2024-09-23T13:23:05Z |
| format | Article |
| id | mit-1721.1/113414 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T13:23:05Z |
| publishDate | 2018 |
| publisher | SPIE |
| record_format | dspace |
| spelling | mit-1721.1/1134142022-09-28T13:50:27Z Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft x-ray beams Siemens, Mark E. Li, Qing Yang, Ronggui Anderson, Erik H. Murnane, Margaret M. Kapteyn, Henry C. Nelson, Keith Adam Massachusetts Institute of Technology. Department of Chemistry Nelson, Keith Adam Heat dissipation from a nanoscale hot-spot is expected to be non-diffusive when a hot-spot is smaller than the phonon mean free path of the substrate. Our technique of observing diffraction of coherent soft x-ray pulses allows for very high resolution (∼pm) of thermally-induced surface distortion, as well as femtosecond time resolution of dynamics. We successfully model our experimental results with a diffusive transport model that is modified to include an additional boundary resistance. These results confirm the importance of considering ballistic transport away from a nanoscale heat source, and identify a means of correctly accounting for this ballistic transport. 2018-02-05T15:48:08Z 2018-02-05T15:48:08Z 2011-02 2018-02-01T12:02:23Z Article http://purl.org/eprint/type/ConferencePaper 0277-786X 1996-756X http://hdl.handle.net/1721.1/113414 Siemens, Mark E. et al “Quasi-Ballistic Thermal Transport from Nanoscale Interfaces Observed Using Ultrafast Coherent Soft x-Ray Beams.” Edited by Kong-Thon Tsen, Jin-Joo Song, Markus Betz, and Abdulhakem Y. Elezzabi. Ultrafast Phenomena in Semiconductors and Nanostructure Materials XV 7937 (February 2011): 793716 © 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE) https://orcid.org/0000-0001-7804-5418 http://dx.doi.org/10.1117/12.871455 Proceedings of SPIE--the Society of Photo-Optical Instrumentation Engineers 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. application/pdf SPIE SPIE |
| spellingShingle | Siemens, Mark E. Li, Qing Yang, Ronggui Anderson, Erik H. Murnane, Margaret M. Kapteyn, Henry C. Nelson, Keith Adam Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft x-ray beams |
| title | Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft x-ray beams |
| title_full | Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft x-ray beams |
| title_fullStr | Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft x-ray beams |
| title_full_unstemmed | Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft x-ray beams |
| title_short | Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft x-ray beams |
| title_sort | quasi ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft x ray beams |
| url | http://hdl.handle.net/1721.1/113414 https://orcid.org/0000-0001-7804-5418 |
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