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Fabry–Pérot microcavities with controllable resonant wavelengths in periodic dielectric waveguides
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View: Figures


Image of FIG. 1.
FIG. 1.

Model description. (a) Schematic of the plane of a PDWG model. (b) The TM band structure for (a). The shaded region represents the band gap where lightwave propagation is inhibited, and the region on the left of the light line represents the extended modes. The dashed frame in the inset shows the supercell. (c) A FP microcavity formed by introducing PDWG II (defect) into PDWG I. (d) Schematic of the transmission bands and the band gaps along the direction in (c).

Image of FIG. 2.
FIG. 2.

Calculations for the proposed PDWG-based FP microcavity. (a) The FDTD simulated electric field distribution in the microcavity. (b) The electric field distribution curve in the plane (red solid line) and the fitted cosine-Gaussian curve (blue dashed line). (c) Calculated intensity spectrum for the cavity. The top wavelengths correspond to the case of .

Image of FIG. 3.
FIG. 3.

Resonant wavelength controllability of the proposed PDWG-based FP microcavity. (a) The microcavity with two defect cylinders shifting towards the center (shown by red arrows). (b) Results of the resonant wavelength (black cross marks) and the corresponding factors (blue dots) vs defect length . The top axis is the corresponding defect cylinder displacement . The red line represents the fitted quadratic function curve for the resonant wavelength .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Fabry–Pérot microcavities with controllable resonant wavelengths in periodic dielectric waveguides