Fig. 4: Photonic aspects of the fabricated closed-loop structure from bent 1-Cl crystal waveguides. | Nature Communications

Fig. 4: Photonic aspects of the fabricated closed-loop structure from bent 1-Cl crystal waveguides.

From: Spatially controllable and mechanically switchable isomorphous organoferroeleastic crystal optical waveguides and networks

Fig. 4

a Stitched confocal optical and (b) FL microscope images (excited with UV torch) of closed-loop structure constructed from ferroelastic bent 1-Cl crystal waveguides, presented on light blue and black colour background panels, respectively. C1-C4, b1-b4 and J1-J4 correspond to ferroelastic bent crystals, bends and junctions, respectively. c Stitched FL images of the closed-loop structure shown in a, when illuminated with 405 nm laser light at the bend, b1. The dotted white arrows show light propagation paths. d, e FL spectra recorded at different positions on the closed-loop structure when excited at b1 and b2, respectively. f Color-coded FESEM image of closed-loop structure shown in a. Bottom insets present the close-up view of the bent portions b1-b4, respectively. (Note: The position of crystals in FESEM was slightly altered while transferring onto the copper substrate to record electron microscope images).

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