Fig. 2
From: Flexible integration of free-standing nanowires into silicon photonics
Integrated FNW–SW MZI for all-optical modulation. a SEM images of the MZI consisting of a U-shaped 300-nm-width SW and a 950-nm-diameter CdS FNW. The lengths of the SW arm and the FNW arm are about 183 and 59 μm, respectively. Scale bar, 20 μm. The inset shows a close-up view of the right-hand coupling region. Scale bar, 5 μm. b Transmission spectrum of the hybrid MZI. c Schematic diagram of all-optical modulation based on the hybrid MZI. Blue circles A and B indicate illuminating areas on the CdS FNW and the SW, respectively. d Modulated outputs from the MZI with 405-nm-wavelength switch pulses
