Near-field probing of photonic crystal directional couplers

V. S. Volkov, S. I. Bozhevolnyi, Peter Ingo Borel, Lars Hagedorn Frandsen, M. Kristensen

Research output: Contribution to journalJournal articleResearchpeer-review


We report the design, fabrication and characterization of a photonic crystal directional with a size of ~20 x 20 mm2 fabricated in silicon-on-insulator material. Using a scanning near-field optical microscope we demonstrate a high coupling efficiency for TM polarized light at telecom wavelengths. By comparing the near-field optical images recorded in and after the directional coupler area, the features of light distribution are analyzed. Finally, the scanning near-field optical microscope observations are found to be in agreement with the transmission measurements conducted with the same sample.
Original languageEnglish
JournalLaser Physics Letters
Issue number6
Pages (from-to)288-292
Publication statusPublished - 2006


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