Bandwidth Control for Photonic Bandgap Waveguides
TEL-AVIV UNIV (ISRAEL)
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A widely spaced periodic array of defects in the photonic band gap crystal is studied with the goal of designing a waveguide with a prescribed narrow bandwidth. Tunnelling of radiation between the defect sites allows wave propagation along the line of the defects. A design procedure based on the weakly coupled cavity model is proposed. The frequency shift and the band structure of the periodic defect waveguide are linked by an analytic relationship to the distance between the defect sites and therefore can be tuned by varying the latter. Sections of such waveguides can be employed as ultra narrow band filters in optical routing devices.
- Electrical and Electronic Equipment
- Radiofrequency Wave Propagation