Fig. 4: SEM images of an example of a square-core hollow-core waveguide nanoprinted on the end face of a PMF. | Light: Science & Applications

Fig. 4: SEM images of an example of a square-core hollow-core waveguide nanoprinted on the end face of a PMF.

From: 3D nanoprinted fiber-interfaced hollow-core waveguides for high-accuracy nanoparticle tracking analysis

Fig. 4

a Oblique view of the entire HCW including PMF. b Top view. c Close-up view of the hollow core section, including the dimensions of the key elements. d Tilted top view of the opening at the bottom of the waveguide. e Close-up view of the opening, including dimensions

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