A study on the image contrast of pseudo-heterodyned scattering scanning near-field optical microscopy Tranca, D. E. ; Stoichita, C. ; Hristu, R. ; Stanciu, S. G. ; Stanciu, G. A. Abstract Publication: Optics Express Pub Date: January 2014 DOI: 10.1364/OE.22.001687 Bibcode: 2014OExpr..22.1687T