Near-field optical microscopy of light propagation through photonic crystal 
waveguide tapers

Wuest, R.; Buchler, B.C.; Harbers, R.; Strasser, P.; Rauscher, K.; Robin, F.; Erni, D.; Sandoghdar, Vahid; Jackel, H.

doi:10.1117/12.608252

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Near-field optical microscopy of light propagation through photonic crystal waveguide tapers

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Citation

Wuest, R., Buchler, B., Harbers, R., Strasser, P., Rauscher, K., Robin, F., et al. (2005). Near-field optical microscopy of light propagation through photonic crystal waveguide tapers. In PHOTONIC MATERIALS, DEVICES, AND APPLICATIONS, PTS 1 AND 2 (pp. 110-117). 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA: SPIE-INT SOC OPTICAL ENGINEERING.

Cite as: https://hdl.handle.net/21.11116/0000-0002-9B66-D

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.