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Phonon Scattering Engineered Unconventional Thermal Radiation at the Nanoscale
Dudong Feng1, Xiaolong Yang1, Xiulin Ruan1
1School of Mechanical Engineering and the Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2088, United States.
Nano Letters
|October 27, 2023
Summary
Engineering phonon scattering in boron arsenide enables novel nanoscale radiative heat transfer for nonlinear thermal circuits. This phonon engineering allows for tunable heat flux regulators and other advanced thermal devices.
Area of Science:
- Materials Science
- Nanotechnology
- Thermal Physics
Background:
- Radiative heat transfer at the nanoscale is crucial for advanced thermal management.
- Nonlinear thermal phenomena offer potential for novel device functionalities.
Purpose of the Study:
- To explore unconventional radiative heat transfer through phonon scattering engineering.
- To propose and analyze nonlinear thermal radiative devices based on boron arsenide.
Main Methods:
- Utilizing isotope enrichment and temperature modulation to engineer phonon scattering.
- Investigating nanoscale radiative heat transfer in boron arsenide bulks.
Main Results:
- Demonstrated potential for unconventional radiative heat transfer via phonon scattering.
- Proposed a tunable heat flux regulator with a wide operational window.
- Introduced designs for negative differential thermal conductance devices, temperature regulators, and thermal diodes.
Conclusions:
- Phonon scattering engineering, via temperature and isotope effects, is key for designing nonlinear radiative thermal devices.
- Boron arsenide offers a promising platform for advanced thermal radiative transport applications.
