Open access
Date
2016-03-16Type
- Journal Article
Abstract
Although losses in plasmonic films can be detrimental for optoelectronics, they can be exploited to create novel thermal emitters. Surface plasmon polaritons that are thermally excited on a heated metal surface can be converted to photons with useful properties. We demonstrate highly tailored thermal emission from tungsten and molybdenum films patterned with a series of circular concentric grooves (i.e., a bull’s eye). At 900 °C our structures emit an infrared beam normal to the film that is spectrally narrow (tens of nanometers) and highly directional (∼2° angular divergence). The peak wavelength (3.5 μm) can be tuned with groove periodicity. To enhance the thermal stability of the structures, we add a thin layer of HfO2. Such devices, with their simple design and low thermal mass, provide interesting incandescent light sources for various applications. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000114796Publication status
publishedExternal links
Journal / series
ACS PhotonicsVolume
Pages / Article No.
Publisher
American Chemical SocietySubject
Optical beaming; Bull's-eye pattern; Plasmonics; Thermal emission; Surface plasmon polaritons; Incandescent light sourcesOrganisational unit
03875 - Norris, David J. / Norris, David J.
Related publications and datasets
Is referenced by: https://doi.org/10.1021/acsphotonics.6b00665
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