Figure 8
APD scan performed as in Fig. 7, but with an integration time of 0.2 s for each data point and the piezo voltage held constant at the maximum value. This scan was started 12 min after the end of the scan in Fig. 7. (a) Entire normalized scan; (b) a region of this scan that shows periodic fringes. These fringes were visible in this scan from the beginning up to 4520 s, fading into a noiselike pattern soon after. |