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Tailored thermal emission in bulk calcite through optic axis reorientation
Katja Diaz-Granados1, Weiliang Ma2, Guanyu Lu3
1Interdisciplinary Materials Science, Vanderbilt University, Nashville, TN 37212, USA.
Nanophotonics (Berlin, Germany)
|December 5, 2024
Summary
Controlling calcite
Area of Science:
- Solid-state physics
- Optics
- Materials science
Background:
- Calcite's polar nature enables lattice vibrations for thermal radiation control.
- Understanding these vibrations is key for designing advanced thermal emitters.
Purpose of the Study:
- Investigate the angle and polarization dependence of calcite's emissivity.
- Explore how optic axis (OA) orientation influences thermal emission patterns.
Main Methods:
- Studied unpatterned calcite with tilted optic axis.
- Analyzed bulk far-field emissivity variations with OA orientation, polarization, and rotation.
Main Results:
- Emissivity varied by up to 0.8 by manipulating OA orientation.
- OA orientation significantly impacts allowed vibrational modes and thermal emission.
Conclusions:
- Calcite's optic axis orientation is a critical parameter for tuning thermal emission.
- OA manipulation offers a method to control thermal emission patterns without complex nanostructuring.
