Ultra Fast Nonlinear Optical Tuning of Photonic Crystal Cavities
arXiv:physics/0611303 · doi:10.1063/1.2710080
Abstract
We demonstrate fast (up to 20 GHz), low power (5 $μW$) modulation of photonic crystal (PC) cavities in GaAs containing InAs quantum dots. Rapid modulation through blue-shifting 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.