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(a) SEM image of the SOI-integrated photonic crystal molecule. (b) Left: SEM close-up view of the triple cavity region, showing the cavity length c = 620 nm and the coupling distance d = 100 nm. Right: Finite Difference Time Domain (FDTD) calculated electric field intensity cross-section of the three eigenmodes of the coupled structure along the dashed-dotted yellow line (y-direction).
Transmission spectrum (black line, left axis) and scattering spectrum (grey line, right axis) from the sample. The scattering spectrum has been vertically shifted for clarity.
Scaling of the estimated number of generated photons for stimulated FWM with varying (a) the pump power at a fixed signal power (the dashed line is a guide to the eye proportional to the square of the pump power), and (b) the input signal power with 17 μW injected at the pump resonance (the dashed line is a guide to the eye proportional to the signal power).
(a) An example of a spontaneous FWM spectrum from the photonic molecule. (b) Integrated intensities of the generated beams as a function of the pump power. The lines are guides to the eye proportional to the square of the pump power.
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