Implementation method of multi-defective one-dimensional photonic crystal all-optical switch with stable and controllable output state
A technology of dimensional photonic crystal and output state, applied in optics, nonlinear optics, instruments, etc., can solve the problems that all-optical switching cannot be realized, and the transmission state of photonic crystal cannot be stabilized.
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[0041] Implementation example: a method for realizing a multi-defect one-dimensional photonic crystal all-optical switch with a stable and controllable output state near a wavelength of 1550nm.
[0042] Select TiO with higher third-order nonlinear susceptibility 2 As the material of the nonlinear defect layer D layer, the linear part of the refractive index of the medium is n d0 =2.5, the nonlinear refractive index coefficient is -6.32×10 -10 cm 2 / kW. Layer A is made of commonly used semiconductor material Si, with a refractive index of n a =3.5; Layer B is air. a, b, and d are the thicknesses of the corresponding layers, satisfying a*n a =b*n b =λ 0 / 4, d=λ 0 / 2 / 2.5; lambda 0 =1550nm, ω 0 = 2πc / λ 0 .
[0043] Pump light frequency ω p = ω 0 , light intensity I P = I 0 =10 4 kW / cm 2 ; signal light frequency ω s =1.029644ω 0 , the light intensity is much smaller than the pump light intensity.
[0044] When the pump light intensity is 0, the transmission spe...
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