Fig. 5
Self-oscillator-based beam modulator. a A self-oscillating strip (bending mode, driven by a continuous 488 nm, 190 mW) can modulate the transmission of a signal beam (635 nm). The signal beam is focused on the upper part of the oscillator as shown by the schematic drawing, while the transmitted beam profiles are shown in the photos. Scale bar: 1 cm. b Transmission measurement of the beam being modulated by the self-oscillator. c Two signal beams are propagating along the same side of the oscillator and the measured transmission intensities being modulated in phase. d Two signal beams are propagating along the opposite sides of the oscillator and the measured transmission intensities being modulated 180° out-of-phase. Blue curves in c, d show the scattered 488 nm light intensity for phase reference. Strip size: 1 × 10 × 0.05 mm3
