Nonequilibrium Electron and Phonon Thermal Transport Driven by External Fields: Towards In Situ Thermal Property Characterization of Active Devices
Abstract
The overarching objective of the proposed program is to demonstrate the effects of externally applied stimuli on thermal transport in materials and active devices, simulating the external loads and energetic excitations and particles that would be impinging on materials and devices in energetic plasma environments. This proposed work has two main goals: 1) experimental quantification of the role of externally applied stimuli and the resulting changes in metal/nonmetal interfacial energy barriers on thermal transport processes in metal thin films and at metal/non-metal interfaces; and 2) experimental quantification and computational simulation of the role of electrical and/or optical excitations on changes in the electron-phonon spectral energy landscape and thermal conductivity of materials. The overarching hypothesis driving this work is that externally applied stimuli and species that are present in plasma fields (e.g., electric fields, optical pulses, accelerated ions) can manipulate both carrier scattering rates and distributions, resulting in changes to thermal transport properties of materials. We culminated this program with the development for a method to measure the carrier scattering rates and temperature changes of surfaces when subjected to directed plasmas
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 04, 2022
- Accession Number
- AD1185106
Entities
People
- Patrick Hopkins
Organizations
- University of Virginia