Figure 5. Observation of light intensity enhancement in biological samples.

(a) Sample setup. The sample consisted of a piece of chicken tissue (1 mm thick) and cartilage, with a quantum dot sheet sandwiched between them for visualisation purpose. (b–c) Image observed by the camera after the 1^st iteration (b) and the 16^th iteration (c) of iTRUE. (d) One dimensional images of the light foci after the 1^st, 2^nd, 4^th, 8^th and 16^th iterations. These images were taken from the corresponding area between the two colour coded blocks shown in (b) and (c) (only the 1^st and 16^th images are shown). The scale bar is 200 μm.