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Opt Lett. 2014 Aug 15;39(16):4942-5. doi: 10.1364/OL.39.004942.

Single-mode air-clad liquid-core waveguides on a surface energy patterned substrate.

Optics letters

Stijn Vandewiele, Toon Brans, Liesbet Van Landschoot, Katarzyna Komorowska, Steven Verstuyft, Ananth Subramanian, Chen Hu, Filip Beunis, Roel Baets

PMID: 25121914 DOI: 10.1364/OL.39.004942

Abstract

We demonstrate a new kind of single-mode micro-optical waveguide based on a liquid core on top of solid substrate and air cladding. The liquid is held in place by surface tension and patterned surface energy on the substrate. Due to the smooth nature of the liquid/air interface down to the molecular level, low scattering losses are expected. Losses were measured to be -6.0 and -7.8 dB/cm for, respectively, 12 and 9 μm wide waveguides.

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