Micro-ring-resonator wavelength-selective filter using highly-stacked quantum dot intermixed waveguide

We fabricated a double micro-ring-resonator wavelength-selective filter using the waveguide fabricated by the intermixing of InAs/InGaAlAs quantum dots grown on an InP (311)B substrate. Intermixing was done by using ICP-RIE etching and annealing technique at a low temperature of 650°C. The output-power contrasts of the device were 9.0 dB and 8.6 dB for TE and TM modes, respectively.