  We demonstrate cantilever-enhanced photoacoustic spectroscopy in the
mid-infrared using a supercontinuum source. The approach is broadband, compact,
and allows for higher photoacoustic signal intensity and enhanced
signal-to-noise ratio as compared to systems employing conventional back body
radiation sources. Using this technique, we perform spectroscopic measurements
of the full ro-vibrational band structure of water vapor at 1900 nm and methane
at 3300 nm with relative signal enhancement factors of 70 and 19, respectively,
when compared to measurements that use a black body radiation source. Our
results offer novel perspective for photoacoustic detection opening the door to
compact and sensitive broadband analyzers in the mid-infrared spectral region.
