A hybrid metal–dielectric zero mode waveguide for enhanced single molecule detection. Issue 65 (29th July 2019)

• Record Type: Journal Article
• Authors: Zambrana-Puyalto, Xavier; Ponzellini, Paolo; Maccaferri, Nicolò; Tessarolo, Enrico; Pelizzo, Maria G.; Zhang, Weidong; Barbillon, Grégory; Lu, Guowei; Garoli, Denis
• Is Part Of: Chemical communications. Volume 55:Issue 65(2019)
• Page Start: 9725
• Page End: 9728
• Publication Date: 2019-07-29
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c9cc04118d
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Demonstration of a high performance hybrid plasmonic zero mode waveguide based on glass–Si–Au film patterned with nanoholes. Abstract : 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.