Title: Quasiballistic Thermal Transport from Nanoscale Heaters and the Role of the Spatial Frequency

Journal Article · · Physical Review Applied
 [1]; ORCiD logo [2];  [3];  [4];  [1]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Chinese Academy of Sciences (CAS), Beijing (China)
  4. Boston College, Chestnut Hill, MA (United States)

Quasiballistic heat conduction from nanoscale heat sources of size comparable to phonon mean free paths has recently become of intense interest both scientifically and for its applications. Prior work has established that, in the quasiballistic regime, the apparent thermal properties of materials depend both on intrinsic mechanisms and the characteristics of the applied thermal gradient. However, many aspects of this regime remain poorly understood. Here, we experimentally study the thermal response of crystals to large thermal gradients generated by optical heating of nanoline arrays. Our experiments reveal the key role of the spatial frequencies and Fourier series amplitudes of the heating profile for thermal transport in the quasiballistic regime, in contrast to the conventional picture that focuses on the geometric dimensions of the individual heaters. As a result, our work provides the insight needed to rationally mitigate local hot spots in modern applications by manipulating the spatial frequencies of the heater patterns.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1491348
Journal Information:
Physical Review Applied, Journal Name: Physical Review Applied Journal Issue: 5 Vol. 10; ISSN 2331-7019; ISSN PRAHB2
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (43)

Energy dissipation and transport in nanoscale devices journal March 2010
Emerging challenges and materials for thermal management of electronics journal May 2014
Nanostructures Significantly Enhance Thermal Transport across Solid Interfaces journal December 2016
High-performance bulk thermoelectrics with all-scale hierarchical architectures journal September 2012
Broadband phonon mean free path contributions to thermal conductivity measured using frequency domain thermoreflectance journal March 2013
Anisotropic failure of Fourier theory in time-domain thermoreflectance experiments journal October 2014
Complex thermoelectric materials journal February 2008
Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft X-ray beams journal November 2009
A new class of doped nanobulk high-figure-of-merit thermoelectrics by scalable bottom-up assembly journal January 2012
Spectral mapping of thermal conductivity through nanoscale ballistic transport journal June 2015
Measuring Phonon Mean Free Path Distributions by Probing Quasiballistic Phonon Transport in Grating Nanostructures journal November 2015
Perspectives on thermoelectrics: from fundamentals to device applications journal January 2012
Phonon scattering in silicon films with thickness of order 100 nm journal May 1999
Analysis of heat flow in layered structures for time-domain thermoreflectance journal December 2004
Pulse accumulation, radial heat conduction, and anisotropic thermal conductivity in pump-probe transient thermoreflectance journal November 2008
Two-tint pump-probe measurements using a femtosecond laser oscillator and sharp-edged optical filters journal November 2008
Thermal conductivity of κ-Al2O3 and α-Al2O3 wear-resistant coatings journal June 1998
Nanoscale thermal transport. II. 2003–2012 journal March 2014
Radial quasiballistic transport in time-domain thermoreflectance studied using Monte Carlo simulations journal April 2014
Disparate quasiballistic heat conduction regimes from periodic heat sources on a substrate journal August 2014
Semi-analytical solution to the frequency-dependent Boltzmann transport equation for cross-plane heat conduction in thin films journal May 2015
Limits to Fourier theory in high thermal conductivity single crystals journal November 2015
A new regime of nanoscale thermal transport: Collective diffusion increases dissipation efficiency journal March 2015
Evaluating Broader Impacts of Nanoscale Thermal Transport Research journal April 2015
Advances in the measurement and computation of thermal phonon transport properties journal January 2015
Thermal Conductivity of MgO, Al 2 O 3 , Mg Al 2 O 4 , and Fe 3 O 4 Crystals from 3° to 300°K journal April 1962
Phonon radiative heat transfer and surface scattering journal October 1988
Frequency dependence of the thermal conductivity of semiconductor alloys journal August 2007
Heat transport in silicon from first-principles calculations journal August 2011
Ab initio thermal transport in compound semiconductors journal April 2013
Two-channel model for nonequilibrium thermal transport in pump-probe experiments journal October 2013
Transport regimes in quasiballistic heat conduction journal March 2014
Analytical interpretation of nondiffusive phonon transport in thermoreflectance thermal conductivity measurements journal August 2014
Nonlocal theory for heat transport at high frequencies journal November 2014
Analytical Green's function of the multidimensional frequency-dependent phonon Boltzmann equation journal December 2014
Superdiffusive heat conduction in semiconductor alloys. I. Theoretical foundations journal February 2015
Superdiffusive heat conduction in semiconductor alloys. II. Truncated Lévy formalism for experimental analysis journal February 2015
Heating-frequency-dependent thermal conductivity: An analytical solution from diffusive to ballistic regime and its relevance to phonon scattering measurements journal April 2015
Multidimensional quasiballistic thermal transport in transient grating spectroscopy journal August 2015
Experimental metrology to obtain thermal phonon transmission coefficients at solid interfaces journal May 2017
Thermal Conductivity Spectroscopy Technique to Measure Phonon Mean Free Paths journal August 2011
Direct Measurement of Room-Temperature Nondiffusive Thermal Transport Over Micron Distances in a Silicon Membrane journal January 2013
High-Thermoelectric Performance of Nanostructured Bismuth Antimony Telluride Bulk Alloys journal May 2008

Cited By (1)

Ballistic thermal phonons traversing nanocrystalline domains in oriented polyethylene journal August 2019

Related Subjects