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Optical hydrogen sensing with metallic photonic crystals and plasmonic metamaterials
Publikationstyp
Conference Paper
Date Issued
2010-11
Sprache
English
Author(s)
Giessen, Harald
Mai, Patrick
Liu, Na
Grossmann, Cornelius
Seidel, Andreas
Orzekowsky, Regina
Meyrath, Todd
Start Page
2177
End Page
2178
Article Number
5690585
Citation
9th IEEE Sensors Conference, SENSORS 2010
Contribution to Conference
Publisher DOI
Scopus ID
Publisher
IEEE
ISBN of container
978-1-4244-8170-5
978-1-4244-8168-2
In this contribution, we are going to present two plasmonic concepts for hydrogen sensing. Our first concept is based on metallic photonic crystals, where a gold grating together with a thin layer of Pd in combination with a waveguide of WO3 can give a strong resonance in the extinction or reflection spectrum. Upon hydrogen exposure, the WO3 undergoes a refractive index change, which will shift the spectral resonance. A suitably tuned laser or LED can interrogate this change and give an optical signal. Our second concept is based on a plasmonic metamaterial which comprises a perfect absorber. A layer made from Pd wires as placed on a spacer layer and a gold mirror. Suitable design parameters lead to a zero transmittance as well as zero reflectance for a given wavelength. Upon hydrogen exposure, this perfect absorption is distorted and reflected light can be detected.
DDC Class
600: Technology