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Signal reconstruction from a scanning near-field optical microscopy approach curve

Abstract : Scanning Near-field Optical Microscopies suffer from the low signal to noise ratio, due to the smallness of the diffracting probe used to get images. Therefore a lock-in amplifier is commonly used to perform homodyne detection. From the lock-in data, we reconstruct the near-field intensity diffracted by the probe-end in the case of approach curves. We show that the reconstructed and the detected signals can strongly differ. The reconstruction of the signal is necessary to give physical interpretation.
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https://hal-utt.archives-ouvertes.fr/hal-02448424
Contributor : Daniel Gavrysiak <>
Submitted on : Wednesday, January 22, 2020 - 12:06:54 PM
Last modification on : Tuesday, October 6, 2020 - 4:30:49 PM

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Dominique Barchiesi, Thomas Grosges. Signal reconstruction from a scanning near-field optical microscopy approach curve. Optics Express, Optical Society of America - OSA Publishing, 2005, 13 (17), pp.6519. ⟨10.1364/OPEX.13.006519⟩. ⟨hal-02448424⟩

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