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Influence of the absorber dimensions on wavefront shaping based on volumetric optoacoustic feedback
X. Lu´is De´an-Ben, H´ector Estrada, Ali Ozbek, and Daniel Razansky
(Black Paramagnetic Polyethylene: 90-106, 180-210)
The recently demonstrated control over light distribution through turbid media based on realtime
three-dimensional optoacoustic feedback has offered promising prospects to interferometrically
focus light within scattering objects. Nevertheless, the focusing capacity of the feedback-based
approach is strongly conditioned by the number of effectively resolvable optical modes (speckles).
In this letter, we experimentally tested the light intensity enhancement achieved with optoacoustic
feedback measurements from different sizes of absorbing microparticles. The importance of the
obtained results is discussed in the context of potential signal enhancement at deep locations within
a scattering medium where the effective speckle sizes approach the minimum values dictated by