Full text loading...
Designed and fabricated L3 coupled cavity system. (a) Simplified model of the system which is consisting of four point-defect cavities in a two-dimensional PC slab. (b) Example of near-infrared top view image of 2 cavities with very close resonant frequencies. (c) field intensity of coupled-cavity transparency mode between two L3 cavities. (d) SEM of the fabricated sample with ; ; and . Each cavity is tuned for high intrinsic . and . Scale bar: . (e) SEM of one of the cavities with higher resolution. Scale bar: .
Temporal delay measurement setup. The straight lines represent optical fibers and dashed lines are coaxial cables. A high speed electro-optic modulator generates a sinusoidal probe beam of 1 GHz. Two 532 nm continuous wave lasers with a spot size at a cavity and interconnecting waveguide region are used for thermo-optic tuning. Refractive index change is at 300 K and we estimate 16 K temperature rise per milliwatt pump.
Comparison between couple mode theory calculations and the experimental results. (a) Cavity resonances are not adjusted and there is no transparency window. [(b) and (c)] Three resonances with spectral and phase detuning controlled for transparency peak windows. [(f) and (g)] Measured and theoretical optical delay corresponding to 17.12 ps for (b) and 16.48 and 13.29 ps for [(c), (d), and (h)]. Histograms of the delay values in [(f) and (g)] where the delay values at the transparency frequencies are distinctive over the noise distribution.
Article metrics loading...