Phase imaging and detection in pseudo-heterodyne scattering scanning near-field optical microscopy measurements

Moreno, CamiloAlda, JavierKinzel, EdwardBoreman, Glenn2023-06-172023-06-172017-021559-128X10.1364/AO.56.001037https://hdl.handle.net/20.500.14352/17601En O.A. en la web del editor. Received 19 October 2016; revised 20 December 2016; accepted 3 January 2017; posted 5 January 2017 (Doc. ID 279131); published 27 January 2017When considering the pseudo-heterodyne mode for detection of the modulus and phase of the near field from scattering scanning near-field optical microscopy (s-SNOM) measurements, processing only the modulus of the signal may produce an undesired constraint in the accessible values of the phase of the near field. A two-dimensional analysis of the signal provided by the data acquisition system makes it possible to obtain phase maps over the whole [0, 2engAtribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/Phase imaging and detection in pseudo-heterodyne scattering scanning near-field optical microscopy measurementsjournal articlehttps://doi.org/10.1364/AO.56.001037open access535.14535.82Phase measurementNear-field microscopySurface plasmonsNanophotonics and photonic crystalsElectromagnetismoÓptica (Física)Optoelectrónica2202 Electromagnetismo2209.19 Óptica Física