Abstract
We explore, to the best of our knowledge, the potential of diffractionless subwavelength grating waveguides for sensing applications. We show that by subwavelength patterning of silicon-wire waveguides the field delocalization can be engineered to increase the sensitivity. Fully vectorial 3D-FDTD simulations confirm the sensitivity enhancement, achieving sensitivities of and for bulk and surface sensing, respectively, which compare favorably to state-of-the-art sensing waveguides.
© 2014 Optical Society of America
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