7 July 2005 Near-field optical microscopy of light propagation through photonic crystal waveguide tapers
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Abstract
We report on the investigation of planar photonic crystal waveguide transitions with a scanning near-field optical microscope (SNOM) in collection mode. An abrupt and a gradual taper design intended to couple light from a W3 (three missing rows of holes) to a W1 waveguide were fabricated in a InGaAsP slab waveguide. SNOM measurements reveal that a taper design can efficiently funnel light into the W1 waveguide. For both designs a suppressed coupling of light into the W1 waveguide is measured for a frequency which corresponds to a mode crossing which we determined by 3D plane wave simulations.
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R. Wuest, R. Wuest, Benjamin C. Buchler, Benjamin C. Buchler, Rik Harbers, Rik Harbers, Patric Strasser, Patric Strasser, K. Rauscher, K. Rauscher, F. Robin, F. Robin, Daniel Erni, Daniel Erni, Vahid Sandoghdar, Vahid Sandoghdar, H. Jackel, H. Jackel, } "Near-field optical microscopy of light propagation through photonic crystal waveguide tapers", Proc. SPIE 5840, Photonic Materials, Devices, and Applications, (7 July 2005); doi: 10.1117/12.608252; https://doi.org/10.1117/12.608252
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