Mid-Infrared (IR) spectroscopy provides information about molecular chemical composition through well-established spectra-structure correlations. Absorption of mid-IR light stimulates vibrational modes, enabling identification of specific functional groups. The spectral region -from 2.5 µm to 25 µm (4000 cm -1 to 400 cm -1 ) -is of particular interest as it encompasses fundamental molecular vibrations associated with specific molecular features. This makes mid-IR spectroscopy a popular choice for chemical analysis. Furthermore, when used in a microscopy configuration, mid-IR spectral imaging allows to acquire molecular chemical images. The versatility of mid-IR chemical imaging is somewhat hampered by its limited spatial resolution, which in traditional (far-field) mid-IR spectroscopy is limited by the Rayleigh criterion given by: