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Optical axis-driven modulation of near-field radiative heat transfer between two calcite parallel structures
Jihong Zhang1, Yang Hu2,3,4, Qing Han5
1School of Electromechanical and Automotive Engineering, Yantai University, Yantai 264005, Shandong, P. R. China.
Physical Chemistry Chemical Physics : PCCP
|September 8, 2022
Summary
Controlling the optical axis (OA) of calcite significantly impacts near-field radiative heat transfer (NFRHT). Orienting the OA along the z-axis enhances NFRHT compared to the x-axis due to hyperbolic polaritons.
Area of Science:
- Condensed Matter Physics
- Nanophotonics
- Heat Transfer
Background:
- Anisotropic optical axis (OA) offers novel light control methods.
- Near-field radiative heat transfer (NFRHT) modulation is underexplored with OA.
- Calcite's anisotropic properties present potential for NFRHT manipulation.
Purpose of the Study:
- Investigate OA orientation effects on NFRHT between calcite structures.
- Analyze the role of hyperbolic polaritons in NFRHT.
- Determine the impact of calcite slab thickness on NFRHT.
Main Methods:
- Numerical simulations of NFRHT between parallel calcite structures.
- Analysis of optical axis orientation (z-axis vs. x-axis).
- Examination of hyperbolic polariton excitation and angular distribution.
Main Results:
- NFRHT is significantly larger when calcite's OA is along the z-axis compared to the x-axis.
- The z-axis orientation allows a full angular range of type I hyperbolic polaritons, enhancing heat flux.
- Calcite slab thickness critically influences NFRHT, with specific orientations showing greater sensitivity.
Conclusions:
- Calcite's optical axis orientation is a key factor in modulating NFRHT.
- Hyperbolic polaritons play a crucial role, with their angular excitation determining heat transfer efficiency.
- Calcite demonstrates potential for advanced NFRHT control applications.
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