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(Color online) (a) Schematic of optical system including a waveguide side coupled to a cavity. Two partially reflecting elements are placed in the waveguide. (b) Scanning electron microscopy of photonic crystal point-defect cavity side coupled to line-defect waveguide. (c) field of the resonance mode midslab from 3D FDTD simulations.
(Color online) (a) Measured and (b) coupled-mode theory (CMT)-calculated transmission spectrum at different input powers.
(a) Measured and (b) CMT-calculated asymmetric hysteresis loops for Fano resonance at a detuning of . The inset of (a) shows the measured hysteresis loop for Lorentzian resonance.
(Color online) (a) CMT-calculated effects of the wavelength detuning . Dashed lines (--) represent Lorentzian bistability which, compared to this particular Fano-type bistability, requires higher detuning to observe bistability and results in lower switching contrast. Effects of (b) mirror reflectivity , (c) cavity factor, and (d) the position of cavity resonance on the switching threshold power and switching contrast. (The red-filled symbols correspond to the experimental parameters.)
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