Apertureless scanning near-field optical microscopy: numerical modeling of the lock-in detection

Abstract : Apertureless scanning near-field optical microscopy (ASNOM) enables one to reach high lateral resolution and to induce localized near-field effects. Experimentally, the vibration of the probe and a lock-in detection are frequently used to increase the signal-to-noise-ratio. In the present work, a finite-element method (FEM) is used to show, through numerical simulations, that for a realistic model in ASNOM it is necessary to include the material and geometrical properties of the setup, the scan, the probe vibration and the lock-in detection. A comparison between numerical results and experimental data is presented and discussed.
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https://hal-utt.archives-ouvertes.fr/hal-02295964
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Submitted on : Tuesday, September 24, 2019 - 4:17:47 PM
Last modification on : Wednesday, September 25, 2019 - 1:29:02 AM

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Radouane Fikri, Thomas Grosges, Dominique Barchiesi. Apertureless scanning near-field optical microscopy: numerical modeling of the lock-in detection. Optics Communications, Elsevier, 2004, 232 (1-6), pp.15-23. ⟨10.1016/j.optcom.2003.12.027⟩. ⟨hal-02295964⟩

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