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Numerical studies of mode gaps and coupling efficiency for line-defect waveguides in two-dimensional photonic crystals
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.ORCID iD: 0000-0003-2136-4914
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2001 (English)In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 6415, no 15Article in journal (Refereed) Published
Abstract [en]

Using conventional waveguides. for light coupling and collection we numerically study band structures and transmission spectra for guided modes in line-defect waveguides. obtained by removing rows of air holes in a lossless triangular-lattice two-dimensional photonic crystal. The two-dimensional finite-difference time-domain method combined with the effective index method and complemented with the coupled mode approximation is employed to analyze mode-gaps (or mini stopbands) arising from Bragg diffraction of the incident mode into the counterpropagating modes. We also show that more than 97% coupling efficiency between the ridge and the photonic crystal waveguides. is achievable by adjustment of the ridge waveguide width.

Place, publisher, year, edition, pages
2001. Vol. 6415, no 15
Keyword [en]
near-infrared wavelengths, macroporous silicon, wave-guides, band-gap, metallic inclusions, transmission, slabs
Identifiers
URN: urn:nbn:se:kth:diva-21041ISI: 000171694600037OAI: oai:DiVA.org:kth-21041DiVA: diva2:339738
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Swillo, Marcin

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