Ordered arrays of near-field optical probes

Neso Sojic; Arnaud Chovin; Patrick Garrigue; Inka Manek-Hönninger; Laurent Servant

doi:10.1117/12.607838

28 June 2005 Ordered arrays of near-field optical probes

Neso Sojic, Arnaud Chovin, Patrick Garrigue, Inka Manek-Hönninger, Laurent Servant

Proceedings Volume 5838, Nanotechnology II; (2005) https://doi.org/10.1117/12.607838
Event: Microtechnologies for the New Millennium 2005, 2005, Sevilla, Spain

Abstract

Ordered arrays of nanometer-sized optical probes with electrochemiluminescent properties were developed on the distal face of imaging fiber bundles. The fabrication steps are adapted from SNOM probes and nanoelectrodes methodologies and allow to produce high-density arrays of opto-electrochemical probes which retain the initial architecture of the bundle. Apertureless probe arrays and also nanoaperture arrays have thus been prepared. The angular distribution of the far-field intensity transmitted through such nanostructured arrays depends both on their respective architectures and on the characteristic dimensions of the nanoprobes. The subwavelength aperture arrays show a diffracting behavior which is a function of the optical aperture size. The far-field analysis demonstrates their potential application as a parallel near-field optical array in both apertureless and aperture configurations. In addition, each optical nanoaperture is surrounded by a ring-shaped gold nanoelectrode. The electrochemical response of the array is sigmoidal in shape indicating that the nanoelectrodes forming the array are diffusively independent. In other words, each nanoelectrode of the array probes electrochemically a different micro-environment. We show also that the nanoaperture array can be used as an electrochemiluminescent nanosensor array for NADH. Eventually, the arrays keep the imaging properties at both nanometer and micrometer scales. Indeed, each nanoprobe can explore optically a near-field region, whereas the global array allows imaging simultaneously a large micrometric area. This optical array format plays therefore a bridging role by interrelating optical and electrochemiluminescent information obtained concomitantly at the nanometer and micrometer scales.

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Neso Sojic, Arnaud Chovin, Patrick Garrigue, Inka Manek-Hönninger, and Laurent Servant "Ordered arrays of near-field optical probes", Proc. SPIE 5838, Nanotechnology II, (28 June 2005); https://doi.org/10.1117/12.607838

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KEYWORDS

Near field optics

Nanoprobes

Optical arrays

Gold

Near field

Near field scanning optical microscopy

Imaging arrays

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