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Surface-sensitive diamond photonic crystals for high-performance gas detection

C. Blin 1, 2 Z. Han 2 Hugues Girard 1 P. Bergonzo 1 P. Boucaud 2 M. El Kurdi 2 S. Saada 1 S. Sauvage 2 X. Checoury 2
1 LCD-LIST - Laboratoire Capteurs Diamant
DM2I - Département Métrologie Instrumentation & Information : DRT/LIST/DM2I
Abstract : Diamond slotted photonic crystal (PhC) cavities were fabricated and used for gas detection. They exhibit wavelength sensitivity reaching a 350 nm per unit change of the refractive index of the gaseous environment of the PhC. With a simple oxidized surface termination, diamond PhCs display an ultrahigh sensitivity to the surface adsorption of polar molecules. Gaseous concentrations as low as 80 parts per million (ppm) of hexanol vapor in nitrogen are probed, and a detection limit in the ppm range is inferred, demonstrating a high interest of such devices for trace sensing.
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Submitted on : Friday, August 31, 2018 - 6:25:09 PM
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C. Blin, Z. Han, Hugues Girard, P. Bergonzo, P. Boucaud, et al.. Surface-sensitive diamond photonic crystals for high-performance gas detection. Optics Letters, Optical Society of America - OSA Publishing, 2016, 41 (18), ⟨10.1364/OL.41.004360⟩. ⟨hal-01865582⟩



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