Phase-controlled, heterodyne laser-induced transient grating measurements of thermal transport properties in opaque material

Abstract

The methodology for a heterodyned laser-induced transient thermal grating technique for non-contact, non-destructive measurements of thermal transport in opaque material is presented. Phase-controlled heterodyne detection allows us to isolate pure phase or amplitude transient grating signal contributions by varying the relative phase between reference and probe beams. The phase grating signal includes components associated with both transient reflectivity and surface displacement whereas the amplitude grating contribution is governed by transient reflectivity alone. By analyzing the latter with the two-dimensional thermal diffusion model, we extract the in-plane thermal diffusivity of the sample. Measurements on a 5 μm thick single crystal PbTe film yielded excellent agreement with the model over a range of grating periods from 1.6 to 2.8 μm. The measured thermal diffusivity of 1.3 \times 10-6 m2/s was found to be slightly lower than the bulk value.

19 pages, 6 figures

Cited by in corpus (21)

• Observation of second sound in graphite at temperatures above 100 K
• Interaction of a Contact Resonance of Microspheres with Surface Acoustic Waves
• Ultrafast carrier dynamics in thin-films of the topological insulator Bi2Se3
• A novel high resolution contactless technique for thermal field mapping and thermal conductivity determination: Two-Laser Raman Thermometry
• Transient grating spectroscopy: An ultrarapid, nondestructive materials evaluation technique
• A Self-Assembled Metamaterial for Lamb Waves
• Tutorial: Characterizing Microscale Energy Transport in Materials with Transient Grating Spectroscopy
• Monte Carlo Study of Non-diffusive Relaxation of A Transient Thermal Grating in Thin Membranes
• Multidimensional quasiballistic thermal transport in transient grating spectroscopy
• Non-contact, non-destructive mapping of thermal diffusivity and surface acoustic wave speed using transient grating spectroscopy
• Unifying first principle theoretical predictions and experimental measurements of size effects on thermal transport in SiGe alloys
• Reduced thermal conductivity of epitaxial GaAs on Si due to symmetry-breaking biaxial strain
• Quasiballistic heat removal from small sources studied from first principles
• Thermal transport in nanoporous holey silicon membranes investigated with optically-induced transient thermal gratings
• Compact models for multidimensional quasiballistic thermal transport
• Transient Grating Spectroscopy of Photocarrier Dynamics in Semiconducting Polymer Thin Films
• API Phonons: Python Interfaces for Phonon Transport Modeling
• Full spatiotemporal control of laser-excited periodic surface deformations
• Towards quantitative inference of nanoscale defects in irradiated metals and alloys
• Study of the acoustic and thermal response of an elastically anisotropic solid to a sub-nanosecond laser pulse in transient grating spectroscopy
• A perspective on inelastic light scattering spectroscopy for probing transport of collective acoustic excitations