The structure of light in photonic crystal waveguides

With a phase-sensitive near-field microscope we measure the propagating of light through a 2D photonic crystal waveguide. We study how the different Bloch harmonics of the propagating light evanescently decay into the air above the waveguide. Furthermore, exploiting the phase sensitivity of our micr...

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Bibliographic Details
Main Authors: van Oosten, D., Burresi, M., Engelen, R.J.P., Opheij, A., Mori, D., Baba, T., Kuipers, L.
Format: Conference Proceeding
Language:English
Subjects:
Electric variables measurement
Finite difference methods
Microscopy
near field optics
Optical polarization
Optical propagation
Optical surface waves
Optical waveguides
Phase measurement
photonic crystal waveguides
Photonic crystals
Probes
singular optics
slow light
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Summary:With a phase-sensitive near-field microscope we measure the propagating of light through a 2D photonic crystal waveguide. We study how the different Bloch harmonics of the propagating light evanescently decay into the air above the waveguide. Furthermore, exploiting the phase sensitivity of our microscope, we are able to reconstruct the electric vector field distribution with subwavelength resolution. In the complex field we observe both time-dependent and time-independent polarization singularities and determine the topology of the surrounding electric field.
ISSN:2162-7339
DOI:10.1109/ICTON.2009.5185266