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Near-field thermal emission by periodic arrays
1Department of Mechanical Engineering and Frontier Institute for Research in Sensor Technologies, University of Maine, Orono, Maine 04469, USA.
Physical Review. E
|July 24, 2019
Summary
A new periodic method models thermal emission from subwavelength emitter arrays. This computationally efficient technique accurately predicts near-field thermal emission for complex designs.
Area of Science:
- Physics
- Nanotechnology
- Materials Science
Background:
- Near-field thermal emission is crucial for energy applications.
- Designing periodic arrays requires accurate predictive models.
- Current models can be computationally intensive.
Purpose of the Study:
- To develop a computationally efficient periodic method for modeling 2D periodic arrays of subwavelength emitters.
- To enable the design of periodic arrays with desired thermal emission properties.
- To provide a versatile tool for studying near-field thermal emission.
Main Methods:
- A periodic method discretizes only one array period.
- Employs discrete dipole approximation (DDA) periodically.
- Expresses array energy density using Green's functions.
Main Results:
- The method is computationally beneficial due to reduced discretization.
- Accurate modeling of complex-shaped and inhomogeneous emitters is possible.
- Verified against nonperiodic DDA simulations.
Conclusions:
- The proposed periodic method is a versatile and reliable tool.
- Enables efficient simulation of near-field thermal emission from periodic arrays.
- Facilitates the design and optimization of nanophotonic devices for thermal management.
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