Multi-Quartz Enhanced Photoacoustic Spectroscopy with Different Acoustic Microresonator Configurations

Figure 4

(a) Single bare QTF based spectrophone, (b) single QTF based “on-beam” spectrophone, and (c), (d) multi-QTF based “on-beam” spectrophones. The geometric parameters of all the AmRs used in Figure 4 are 4.4 mm in length and 0.6 mm in inner diameters, respectively.

(a)

(b)

(c)

(d)