Skip to Main content Skip to Navigation
Journal articles

Modeling recent experiments of apertureless near-field optical microscopy using 2D finite element method

Abstract : Recently promising experiments of apertureless scanning near-field optical microscopy (ASNOM) have been reported [Appl. Phys. Lett. 79 (24) (2001) 4019]. They deal with the study of the confinement of the light in the vicinity of a nanometric tip which produces a nanosource of great interest to study local physical effects or to elaborate nanostructures. These experiments consist of “imaging” the electromagnetic field in the vicinity of a vibrating tip by using a photopolymer placed in the near-field region of the tip under laser illumination. Nanometer-size polymer dots, produced by local-field enhancement at the tip extremity, are characterized by atomic force microscopy. The dot height is related to the local-optical intensity at the tip end. In this paper, in order to model these experiments, we introduce for the first time in the context of SNOM a 2D harmonic finite element simulation enabling the calculation of the electromagnetic field in the vicinity of a tip for apertureless scanning near-field optical microscopy. Both tip vibration and realistic tip geometry have been taken into account and the dot height has been calculated as a function of both the vibration amplitude during exposure and the polarization of the incident light. Results of the finite element calculations are found to be in good agreement with the experimental data and are compared to simple analytical calculations.
Complete list of metadatas

https://hal-utt.archives-ouvertes.fr/hal-02402804
Contributor : Daniel Gavrysiak <>
Submitted on : Tuesday, December 10, 2019 - 4:02:05 PM
Last modification on : Friday, March 27, 2020 - 4:12:03 PM

Identifiers

Collections

P2MN | UTT | CNRS

Citation

Radouane Fikri, Dominique Barchiesi, Fekra H'Dhili, Renaud Bachelot, Alexandre Vial, et al.. Modeling recent experiments of apertureless near-field optical microscopy using 2D finite element method. Optics Communications, Elsevier, 2003, 221 (1-3), pp.13-22. ⟨10.1016/S0030-4018(03)01463-9⟩. ⟨hal-02402804⟩

Share

Metrics

Record views

229