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Journal Article

A "standing-wave meter" to measure dispersion and loss of photonic-crystal waveguides

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Wuest, R., Erni, D., Strasser, P., Robin, F., Jackel, H., Buchler, B., et al. (2005). A "standing-wave meter" to measure dispersion and loss of photonic-crystal waveguides. Applied Physics Letters, 87: 261110. doi:10.1063/1.2151254.

Cite as: https://hdl.handle.net/21.11116/0000-0002-9B6C-7
We demonstrate a "standing-wave meter" for measuring dispersion and loss along the length of a planar InP-based photonic-crystal waveguide. Light from a tunable cw laser was coupled into a single line-defect waveguide that terminated inside the crystal structure to form a retroreflector. This structure created a standing wave which was imaged using a scanning near-field optical microscope. By measuring the intensity distribution of the standing wave for a range of optical frequencies, waveguide dispersion and loss were measured with high accuracy. Comparisons of the measurement results with three-dimensional numerical simulations reveal that material dispersion effects as small as 0.8% affect the band structure measurably. (c) 2005 American Institute of Physics.