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(a) Schematic representation of the proposed switching concept. A photonic chip is shown along with access waveguides (black) and a photonic device where light is to be manipulated (green). The switching pulse (black) overtakes the signal pulse in the photonic device and induces a dynamic change. (b) SEM picture of the photonic crystal heterostructure cavity. The length of the scale bar corresponds to 2 μm. (c) Experimental setup. EDFA, erbium-doped fiber amplifier; Coll., collimator; HWP, half-wave plate; Pol., polarizer; BS, beam splitter; TM, tilting mirror; DS, delay stage; OSO, optical sampling oscilloscope; OSA, optical spectrum analyzer; and PD, photodiode.
(a) Transmission spectrum of the photonic crystal heterostructure cavity. The signal frequency is positioned at the resonance frequency, the frequency of the switching pulse in the pass band. (b) Resonance shift as a function of the photodiode signal corresponding to the energy of the switching pulse at the output of the chip.
(a) Signal transmission spectra at different relative pulse delays. A positive delay corresponds to the case when the signal runs ahead of the switching pulse. (b) Frequency conversion efficiency as a function of the frequency shift.
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