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首页> 外文期刊>Letters in heat and mass transfer >The impact of internal polarized monochromatic acoustic phonon emission on heat dissipation at nanoscale
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The impact of internal polarized monochromatic acoustic phonon emission on heat dissipation at nanoscale

机译：内部极化单色声子声子发射对纳米尺度散热的影响

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Internal monochromatic acoustic phonon emission has a distinct impact on temperature distribution, as well as transient heat dissipation, depending on the emitted phonon frequency and its polarization branch. A Monte Carlo simulation of phonon transport was used to study the impact of internal acoustic phonon emission on heat dissipation at nanoscale in a silicon thin film. The cause of the emission can be due to other energy carriers or by a direct external source. The simulation utilized parabolic phonon dispersion relations in longitudinal acoustic {LA) and transverse acoustic (TA) polarizations with three phonon-phonon scatterings. The Normal and Umklapp phonon scatterings were included in the simulation. All the scattering events scatter phonons isotropically. Results indicated that monochromatic TA-phonon emission within the film tends to create higher local peak temperature than that of LA-phonon emission with an identical volumetric power generation.
机译：内部单色声子声子发射对温度分布以及瞬态散热有明显影响，具体取决于发射的声子频率及其极化分支。声子传输的蒙特卡洛模拟用于研究内部声子声子发射对硅薄膜中纳米级散热的影响。发射的原因可能是由于其他能量载体或直接的外部来源。该模拟利用具有三个声子-声子散射的纵向声波（LA）和横向声波（TA）极化中的抛物线声子色散关系。模拟中包括正态和Umklapp声子散射。所有散射事件均使声子各向同性散射。结果表明，在相同体积发电的情况下，薄膜中的单色TA声子发射往往会产生比LA声子发射更高的局部峰值温度。

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