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Broadband switching functionality based on defect mode coupling in W2 photonic crystal waveguide
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Schematic diagram of the proposed device; (b) the SEM image of the W2 PCW, where the lattice constant, a, and the hole radius, r, are 440 nm and 145 nm, respectively; (c) optical microscope picture of the fabricated W2 PCW with its titanium (Ti)/aluminum (Al) microheater.

Image of FIG. 2.
FIG. 2.

(a) TE mode band structure and (b) transmission spectra under different refractive index variations of the W2 PCW with structure parameters: a = 440 nm and r = 145 nm.

Image of FIG. 3.
FIG. 3.

(a) Three dimensional temperature distribution with a heating power of P = 59 mW; (b) temperature increase under different applied heating powers.

Image of FIG. 4.
FIG. 4.

Microscope picture of the measured W2 PCW with input- and ouput-fibers. Here, the two electrical probes are used to apply a potential on two Al contact pads of the microheater.

Image of FIG. 5.
FIG. 5.

(a) Measured transmission spectra under different applied heating powers, here the time frame needed to take data is 24 s; (b) extinction ratio of the switching on- and off-state.

Image of FIG. 6.
FIG. 6.

Measured optical response of the output port of the optical switch at a fixed optical wavelength of 1563 nm, as it is driven by (a) 1 kHz and (b) 5 kHz rectangular wave signals.


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Scitation: Broadband switching functionality based on defect mode coupling in W2 photonic crystal waveguide