Fig. 4: UFP optical focusing into scattering media via a full-phase modulation scheme.
From: Focusing light into scattering media with ultrasound-induced field perturbation
a Phase map displayed on the SLM, based on the differential signal between the measured complex fields when the ultrasound was OFF and ON. b Time-reversed focus from UFP optical focusing. c No optical focus was observed in a control experiment conducted without launching the ultrasound. d Time-reversed focus from conventional TRUE optical focusing under the same condition. e Line profiles of the central rows in b–d. Scale bars: 1 mm
