Hokkaido University Research Profiles

Nanotechnology / Materials

Infrared Metamaterials Produced by Microfabrication of High Temperature Resistant Materials

Development of materials and devices that manipulate mid- to far-infrared radiation

It is expected that it will be possible to make devices to control corresponding electromagnetic waves by creating heaters and diffraction gratings with patterns smaller than the mid- to far-infrared wavelengths. We are developing methods to fabricate thin films, stacks, and microstructures of metal carbides and oxides, and are studying their elemental characteristics.

Content of research

Materials that are finely processed on a scale of less than the wavelength of electromagnetic waves can control the reflection and transmission of electromagnetic waves (such materials are known as metamaterials). Mid- to far-infrared radiation, with wavelengths ranging from 3 μm to 1000 μm, can be used for the detection of molecules as it is an electromagnetic wave that is related to heat radiation and can excite molecular vibrations. Since it is a heat-related material, being heat-resistant would render it usable for applications that cannot be realized elsewhere. We are studying process technology for heat-resistant materials with various properties such as metal carbides and oxides, and are measuring the fundamental properties of these materials in the infrared region for application to metamaterial design. By fabricating metamaterials for mid- to far-infrared radiation, we aim to create narrow linewidth mid-infrared light emitting devices for molecular detection and materials for controlling radiation heat.

  • Radio-frequency heating furnace for heat-resistant material synthesis
    (2700°C for normal use, 3000°C for a short time)

  • Examples of microfabrication of heat-resistant materials

Potential for social implementation

  • ・Narrow linewidth mid- to far-infrared emitting elements (for sensors)
  • ・Control and accumulation of radiant heat
  • ・Optical elements for mid- to far-infrared light

Appealing points to industry and local governments

For the new application of heat-resistant materials, there are many things that need to be done such as physical property evaluation, device design, and device property evaluation. The equipment and methods are now becoming available in our laboratory, and we hope to be able to provide solutions for industrial needs.