Figure 4
From: Wavelength-converted wave-guiding in dye-doped polymer nanofibers
2 × 2 and 3 × 3 splitters.
(a) SEM image of a 2 × 2 splitter with diameters of 553 and 475 nm for branches A-2 and B-1, respectively. The branching angle between the branches 1 and 2 is 20°. (b) Optical microscope image of the same splitter as (a) by launching 532-nm green light (0.12 μW) to the branch A by evanescent coupling. The green arrow shows the propagation direction of the input light. (c) A 3 × 3 splitter with diameters of 610, 508 and 545 nm for branches A, B and C, respectively. The green arrow shows the propagation direction of the input light.
