TY - GEN AU - Wen,Qing AU - Michaelian,Kirk H TI - Mid-infrared photoacoustic spectroscopy of solids using an external-cavity quantum-cascade laser SN - 0146-9592 PY - 2008///1017 N1 - Publication Type: Journal Article UR - https://doi.org/10.1364/ol.33.001875 ER -