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Related Experiment Video

Updated: Jun 5, 2025

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Narrowband diffuse thermal emitter based on surface phonon polaritons.

Binze Ma1, Yun Huang1, Weiyi Zha1

  • 1State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China.

Nanophotonics (Berlin, Germany)
|December 5, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a novel narrowband, diffuse thermal emitter using germanium nanostructures on silicon carbide. This innovation enables precise spectral and spatial control for advanced infrared applications.

Keywords:
diffuse thermal emitternarrowbandsurface phonon polaritons

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Area of Science:

  • Nanophotonics
  • Metamaterials
  • Thermal Engineering

Background:

  • Controlling thermal emission for spectral and spatial selectivity is crucial.
  • Existing narrowband emitters are angle-sensitive, while diffuse emitters have low quality factors.
  • Nanophotonic approaches offer potential solutions for simultaneous control.

Purpose of the Study:

  • To demonstrate a simultaneous narrowband and diffuse thermal emitter.
  • To achieve high quality factor and broad spatial emission.
  • To explore tunability using phase change materials.

Main Methods:

  • Fabrication of 80 nm thick germanium nanostructures on silicon carbide.
  • Utilizing surface phonon polaritons for coherent emission.
  • Characterization of spectral and angular emission properties.

Main Results:

  • Achieved a high quality factor (Q=101) narrowband emission at ~10.9 μm.
  • Demonstrated strong diffuse thermal emission with a 70° full angle at half maximum.
  • Successfully tuned emission by replacing germanium with phase change materials like Ge2Sb2Te5 and In3SbTe2.

Conclusions:

  • The developed nanostructure provides simultaneous narrowband and diffuse thermal emission.
  • This technology offers new possibilities for engineering thermal radiation.
  • Potential applications include infrared sources, radiative cooling, sensing, and photovoltaics.