Abstract
Near-field optical signals are imaged in the vicinity of nano-holes using two different near-field optical microscopes. The experimental results are compared with electromagnetic field calculations based on a modal approximation. It turns out that an optical fibre detects the Poynting vector whereas the apertureless tip is sensitive to the field amplitude.
Highlights
Scanning near-field optical microscopy has undergone a remarkable growth over the last decade [1]
Well defined test samples investigated with various types of Scanning NearField Microscope (SNOM) or Scanning Tunnelling Optical Microscope (STOM) working in several illumination modes are sparse
In most of the experiments done on the test object [3], the SNOM signal observed when scanning an isolated hole shows two lobes aligned with the direction of polarisation of the incident beam
Summary
Scanning near-field optical microscopy has undergone a remarkable growth over the last decade [1]. Well defined test samples investigated with various types of Scanning NearField Microscope (SNOM) or Scanning Tunnelling Optical Microscope (STOM) working in several illumination modes are sparse. The investigations on such test samples have stimulated much efforts in the CNRS framework of the French Research Group “Optique du Champ Proche”. The samples investigated are truncated circular holes created in a chromium layer deposited on a cover glass slide. Such test objects are well suited to understand the nature of the optical signal recorded by different apparatus. The a Groupement de Recherche “Optique du Champ Proche”, CNRS 1860
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
