Laser repetition rate in time-domain thermoreflectance techniques
| Autor: | J.L. Smoyer, LeighAnn S. Larkin, Pamela M. Norris |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Fluid Flow and Transfer Processes Materials science business.industry Mechanical Engineering Laser source Time-domain thermoreflectance 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Laser 01 natural sciences law.invention Thermal conductivity law 0103 physical sciences Thermal Femtosecond Optoelectronics Thin film 0210 nano-technology business |
| Zdroj: | International Journal of Heat and Mass Transfer. 109:786-790 |
| ISSN: | 0017-9310 |
| Popis: | Pump-probe thermoreflectance techniques have been utilized extensively to measure the thermal properties; such as, thermal conductivity and interfacial conductances of thin film systems. While there have been many implementations of transient measurements, the most commonly operated systems utilize a near-IR femtosecond pulsed system as the fundamental laser source. The repetition rate of these femtosecond pulsed systems can vary from kHz to MHz. Thus, we perform an in-depth comparison of the implementation and analysis of low-repetition rate and high-repetition rate time-domain thermoreflectance (TDTR), demonstrating that despite varying the repetition-rate, the measured thermal properties are consistent. To illustrate the universality of these systems, we selected a range of materials to study on both TDTR set-ups, including the thermal conductivity of a SiC film, a SiO2 film, and the interfacial conductances of Al/SiO2 and Al/SiC systems. |
| Databáze: | OpenAIRE |
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