A Planar Scanning Probe MicroscopeClick to copy article linkArticle link copied!
- Stefan ErnstStefan ErnstWalter Schottky Institut and Physik Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, GermanyNanosystems Initiative Munich (NIM), Schellingstraße 4, 80799 München, GermanyMore by Stefan Ernst
- Dominik M. IrberDominik M. IrberWalter Schottky Institut and Physik Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, GermanyNanosystems Initiative Munich (NIM), Schellingstraße 4, 80799 München, GermanyMore by Dominik M. Irber
- Andreas M. WaeberAndreas M. WaeberWalter Schottky Institut and Physik Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, GermanyNanosystems Initiative Munich (NIM), Schellingstraße 4, 80799 München, GermanyMore by Andreas M. Waeber
- Georg BraunbeckGeorg BraunbeckWalter Schottky Institut and Physik Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, GermanyNanosystems Initiative Munich (NIM), Schellingstraße 4, 80799 München, GermanyMore by Georg Braunbeck
- Friedemann Reinhard*Friedemann Reinhard*E-mail: [email protected]Walter Schottky Institut and Physik Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, GermanyNanosystems Initiative Munich (NIM), Schellingstraße 4, 80799 München, GermanyMore by Friedemann Reinhard
Abstract

Scanning probe microscopy (SPM) is traditionally based on very sharp tips, where the small size of the apex is critical for resolution. This paradigm is about to shift, since a novel generation of planar probes (such as color centers in diamond, superconducting sensors, and single electron transistors) promises to image small electric and magnetic fields with hitherto inaccessible sensitivity. To date, much effort has been put into fabricating these planar sensors on tip-like structures. This compromises performance and poses a considerable engineering challenge, which is mastered by only a few laboratories. Here we present a radically simplified, tipless, approach, a technique for scanning an extended planar sensor parallel to a planar sample at a distance of few tens of nanometers. It is based on a combination of far-field optical techniques to measure both tilt and distance between probe and sample with sub-mrad and sub-nm precision, respectively. Employing these measurements as a feedback signal, we demonstrate near-field optical imaging of plasmonic modes in silver nanowires by a single NV center. Our scheme simultaneously improves the sensor quality and enlarges the range of available sensors beyond the limitations of existing tip-based schemes.
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