Figure 2
From: All-optical routing and switching for three-dimensional photonic circuitry
All-optical routing at a Y-junction.
Experiments (top row) and simulations (bottom row) at a Y- junction (left micrograph in Fig. 1c) showing the intensity distribution at the sample’s output. Left column: The strongly localised high power beam, launched into the waveguide marked with a red circle in Fig. 1c. Central column: The propagation of a low power signal, launched into the waveguide marked with a white circle in Fig. 1c, when no blocker beam is present. Right column: Interaction of the two beams at the induced nonlinear defect; the lower branch gets blocked and the signal is routed into the upper port. Only the signal component is shown. In the experiment (simulation), a power ratio of ∼9dB (14dB) was achieved between the two branches, compared to 0dB (1dB) in absence of the gating pulse. Signal and Blocker intensities have been rescaled to their respective maximum. The thick arrow indicates the transverse motion of the input signal, while the smaller arrows and the percentage values show the relative power in each branch at the output of the device. For a full simulation of the light evolution see Movies S1-2 in the Supplementary Videos.
