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. 2019 Oct 1;9(10):1401. doi: 10.3390/nano9101401

Figure 2.

Figure 2

Fabrication of a nanoplasmonic slot waveguide. (a) Fabrication of the Si3N4 slot waveguides. (b) Atomic layer deposition of Al2O3. (c) Gold deposition. The arrows mark the gap width of the nanoplasmonic slot waveguide.