Related Experiment Videos
Thermal radiation from photonic crystals: a direct calculation
Chiyan Luo1, Arvind Narayanaswamy, Gang Chen
1Center for Materials Science and Engineering, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Physical Review Letters
|December 17, 2004
Summary
Photonic crystals do not emit more thermal radiation than blackbodies, but can enhance emission compared to uniform slabs. This suggests potential applications in lighting and thermal photovoltaics.
Area of Science:
- Physics
- Materials Science
- Optics
Background:
- Understanding thermal emissivity is crucial for energy applications.
- Photonic crystals offer unique optical properties due to their structure.
- Investigating their thermal emission properties is an active research area.
Purpose of the Study:
- To simulate and analyze the equilibrium thermal emissivity of dispersive, lossy photonic crystals.
- To compare their emission characteristics with theoretical limits (Kirchhoff's law) and conventional materials.
Main Methods:
- Classical simulation of thermal emissivity.
- Analysis of radiation intensity from photonic crystals.
Main Results:
- Simulations confirm photonic crystals adhere to Kirchhoff's law, not exceeding blackbody emission.
- Significant enhancement in radiation intensity was observed compared to uniform slabs.
- The findings highlight the potential of photonic crystals for specific thermal applications.
Conclusions:
- Photonic crystals can be engineered for enhanced thermal emission.
- Their properties make them promising for advanced incandescent lighting and thermal photovoltaic devices.