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Ultrafast and low-power photonic crystal all-optical switching with resonant cavities
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10.1063/1.3245331
/content/aip/journal/jap/106/8/10.1063/1.3245331
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/8/10.1063/1.3245331

Figures

Image of FIG. 1.
FIG. 1.

Schematic configuration of 1D defect photonic crystal. The refractive index of the alternative material are and , respectively. Moreover, the thickness are and , respectively. The defect layer is the nonlinear layer with the linear refractive index of 1.59, thickness of 515 nm, and the nonlinearity susceptibility of .

Image of FIG. 2.
FIG. 2.

Calculated transmission character of a cavity mode in a 1D defect photonic crystal. The peak wavelength is located at 1550.6 nm, and the quality factor is about 830.

Image of FIG. 3.
FIG. 3.

(a) Calculated transmission spectrum for the defective 1D photonic crystal with the position of pump and probe beam designated by arrows. (b) The dynamic response of the probe beam (black line) and the incident pump power in time domain (red line). The probe beam is located at the defect mode of 1550.6 nm with the quality factor of 830.

Image of FIG. 4.
FIG. 4.

The dynamic responses of all-optical switching with different quality factors. The rise time changes a lot which is 0.855, 2.167, and 5.463 ps, respectively. The drop time is 0.3, 0.708, and 1.844 ps, respectively.

Image of FIG. 5.
FIG. 5.

(a) Calculated dynamic response curves of all-optical switching with different durations of incident pump pulse. (b) Response curve of probe beam with the pump duration of 1.6 ps (black line) and the incident pump pulse with the central wavelength of 850 nm (red line).

Image of FIG. 6.
FIG. 6.

(a) The dynamic response curves of all-optical switching with different durations of incident pump pulse. The durations are 4.8, 6.4, and 8 ps, respectively. (b) The response curve of probe beam and the time curve of pump pulse with the duration of 6.4 ps. The two curves have almost the same time width.

Image of FIG. 7.
FIG. 7.

(a) The intensity distribution within the defect photonic crystal at the defect mode of 1550.6 nm. The quality factor is fixed at 830, and the maximum intensity enhancement factor is about 244.65, which locates at the edge of defect layer. (b) The relationship between the maximum intensity enhancement factor at the defect layer and the quality factors of photonic crystal. The linear relationship is obtained.

Image of FIG. 8.
FIG. 8.

Comparison of pump powers under the situation with or without the high- cavity mode for pump pulse. The central wavelength of pump pulse is located at 850 nm (black line) and 1550.6 nm (red line), respectively. The wavelength of probe beam is 1550.6 nm. 70 times reduction in pump power is obtained.

Image of FIG. 9.
FIG. 9.

Comparison of pump powers with different defect modes. (a) Response curves with the probe beam located at 516.7 nm. The pump power is and when the central wavelength of pump pulse is located at 516.7 and 1550.6 nm, respectively. (b) Response curves with the probe beam located at 1550.6 nm. The pump power is and when the central wavelength of pump pulse is located at 516.7 and 1550.6 nm, respectively. (c) The intensity distribution (black line) in the photonic crystal at the wavelength of 516.7 nm. The dielectric constant arrangement is also depicted (red line).

Tables

Generic image for table
Table I.

Calculated results of pump power with different quality factors of cavity mode. The wavelength of probe beam is 1550.6 nm, which matches the peak wavelength of cavity mode, while the central wavelength of pump beam is 850 nm, which is set at the passband of photonic crystal.

Generic image for table
Table II.

Consumed pump power under different quality factors of the cavity mode. The wavelengths of both pump and probe beams are located at the same peak wavelength of 1550.6 nm, which matches the resonant wavelength of the cavity mode.

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/content/aip/journal/jap/106/8/10.1063/1.3245331
2009-10-20
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ultrafast and low-power photonic crystal all-optical switching with resonant cavities
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/8/10.1063/1.3245331
10.1063/1.3245331
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