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Storing light in active optical waveguides with single-negative materials
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10.1063/1.3431574
/content/aip/journal/apl/96/21/10.1063/1.3431574
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/21/10.1063/1.3431574
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) The effective indices and thickness , the normalized energy flow of the modes in a planar dielectric waveguide cladded with a metal with at a fixed wavelength. Inset shows the zoom in for band. (b) Normalized energy flow for different eigenmodes band. Inset shows the schematics of a symmetric planar waveguide made of dielectric cladded with a single-negative material for stopping the TM modes.

Image of FIG. 2.
FIG. 2.

(a) FDTD simulations of the magnetic field of a continuous wave propagating through a linearly tapered waveguide at . Plotted is the magnetic field intensity. (b) The group index . The dielectric core layer with is tapered from 500 nm down to 220 nm over a length of (within the dashed lines). The cladding metal has . Inset shows the zoom-in of .

Image of FIG. 3.
FIG. 3.

The effect of loss and gain on the phase index and group velocity. (a) Without loss, the forward- and backward-wave modes merge at the critical thickness with the same phase index, leading to (d) zero group velocity. (b) When the loss is present, the and modes are separated, leading to (e) finite group velocity. (c) When gain is introduced and tuned to the critical value, the and modes merge again at the critical thickness, leading to (f) the resorting of zero group velocity. (g) The effect of gain on the group velocity of the mode in a uniform waveguide of thickness at . The waveguide has and the cladding Drude metal has at . The critical gain is . (h) Critical gain for different absorptive loss .

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/content/aip/journal/apl/96/21/10.1063/1.3431574
2010-05-25
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Storing light in active optical waveguides with single-negative materials
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/21/10.1063/1.3431574
10.1063/1.3431574
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