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. 2018 Jul 26;8:11252. doi: 10.1038/s41598-018-29300-1

Figure 5.

Figure 5

(a) Normalized photoluminescence spectrum of SWNTs deposited on Si micro-ring resonators with bus waveguide width of Wbus = 270 nm, ring waveguide width of Wring = 350 nm, ring radius of R = 5 μm, and bus-to-ring gap, G varying between 80 nm and 270 nm. SWNTs are excited at 735 nm wavelength from the chip surface using a microscope objective and the generated PL is collected from the chip facet with polarization maintaining lensed fiber. Detail of collected PL for (b) G = 260 nm, and (c) G = 90 nm. (d) Figure of merit estimated from measurements.