Figure 6
From: Si-Doped Ceramic Al4O4C Nanowires: Full-Color Emission and Optical Waveguide Behavior

(a1–a3) Optical images obtained using a 473-nm laser with various powers. (b1–b3) Optical images obtained using a 532-nm laser. (c1–c3) Optical images obtained using a 650-nm laser with various powers. (d) Illustration of the experimental configuration for the efficiency measurement, in which P1 and P2 represent the input and output laser power through the nanowire, respectively and Pin and Pout represent the laser power transported across the fiber. (e) Optical image of the assembly, in which the blue arrows indicate the coupling sites between the nanowire and the tapered fibers. (f) Quantitative analysis of the propagation efficiency of the 473-nm light through the nanowire; the right axis “η” represents the transmission efficiency as recorded by the black squares. (g) Quantitative analysis of the propagation efficiency of the 532-nm laser. (h) Quantitative illustration of the propagation efficiency of the 650-nm light.