contributor author | Liang Guo | |
contributor author | Stephen L. Hodson | |
contributor author | Timothy S. Fisher | |
contributor author | Xianfan Xu | |
date accessioned | 2017-05-09T00:52:21Z | |
date available | 2017-05-09T00:52:21Z | |
date copyright | April, 2012 | |
date issued | 2012 | |
identifier issn | 0022-1481 | |
identifier other | JHTRAO-27938#042402_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/149492 | |
description abstract | Heat transfer across metal-dielectric interfaces involves transport of electrons and phonons accomplished either by coupling between phonons in metal and dielectric or by coupling between electrons in metal and phonons in dielectric. In this work, we investigate heat transfer across metal-dielectric interfaces during ultrafast-laser heating of thin metal films coated on dielectric substrates. By employing ultrafast-laser heating that creates strong thermal nonequilibrium between electrons and phonons in metal, it is possible to isolate the effect of the direct electron–phonon coupling across the interface and thus facilitate its study. Transient thermo-reflectance measurements using femtosecond laser pulses are performed on Au–Si samples while the simulation results based on a two-temperature model are compared with the measured data. A contact resistance between electrons in Au and phonons in Si represents the coupling strength of the direct electron–phonon interactions at the interface. Our results reveal that this contact resistance can be sufficiently small to indicate strong direct coupling between electrons in metal and phonons in dielectric. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Heat Transfer Across Metal-Dielectric Interfaces During Ultrafast-Laser Heating | |
type | Journal Paper | |
journal volume | 134 | |
journal issue | 4 | |
journal title | Journal of Heat Transfer | |
identifier doi | 10.1115/1.4005255 | |
journal fristpage | 42402 | |
identifier eissn | 1528-8943 | |
keywords | Temperature | |
keywords | Heat transfer | |
keywords | Electrons | |
keywords | Metals | |
keywords | Lasers | |
keywords | Measurement | |
keywords | Reflectance | |
keywords | Phonons | |
keywords | Top-tensioned risers | |
keywords | Heating AND Simulation results | |
tree | Journal of Heat Transfer:;2012:;volume( 134 ):;issue: 004 | |
contenttype | Fulltext | |