Reference : A hybrid metal–dielectric zero mode waveguide for enhanced single molecule detection
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
A hybrid metal–dielectric zero mode waveguide for enhanced single molecule detection
Zambrana-Puyalto, Xavier [Istituto Italiano di Tecnologia]
Ponzellini, Paolo [Istituto Italiano di Tecnologia]
Maccaferri, Nicolò mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Tessarolo, Enrico [CNR-IFN]
Pelizzo, Maria Guglielmina [CNR-IFN]
Zhang, Weidong [Peking University]
Barbillon, Grégory [EPF—École d’Ingénieurs]
Lu, Guowei [Peking University]
Garoli, Denis [Istituto Italiano di Tecnologia]
Chemical Communications
Royal Society of Chemistry
Yes (verified by ORBilu)
United Kingdom
[en] We fabricated hybrid metal–dielectric nanoslots and measured their optical response at three different wavelengths. The nanostructure is fabricated on a bilayer film formed by the sequential deposition of silicon and gold on a transparent substrate. The optical characterization is done via fluorescence spectroscopy measurements. We characterized the fluorescence enhancement, as well as the lifetime and the detection volume reduction for each wavelength. We observe that the hybrid metal–dielectric nanoslots behave as enhanced zero mode waveguides in the near-infrared spectral region. Their detection volume is such that they can perform enhanced single-molecule detection at tens of μM. We compared their behavior with that of a golden ZMW, and we demonstrated that the dielectric silicon layer improves both the optical performance and the stability of the device.

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