Fig. 6.

(a) Photograph of the 9.4 cm-thick phantom in the $XY$ plane. (b) Photograph of the cross-section of the phantom at the central $Y$ plane ($Y=4.7\mathrm{cm}$). (c) Peak power of the modulated-light along the $X$ direction. Measured peak power of the unmodulated-light distribution without ultrasound modulation is also included (blue dashed curve) for comparison.