The authors demonstrate fast (up to 20GHz), low-power (60fJ, 3ps pulses) modulation of photonic crystal cavities in GaAs containing InAs quantum dots. Rapid modulation through blueshifting of the cavity resonance is achieved via free-carrier injection by an above-band picosecond laser pulse. Slow tuning by several linewidths due to laser-induced heating is also demonstrated.
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Fushman et al. (2007) studied this question.
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