%Ultra-compact Optical Buffers on Silicon Chip, F. Xia et al, Nature Photonics 2007 \OIL 007 mod Ring 3 \LAYER1 MAT:SI THI:10um IND:3.46 \END LAYER1 \LAYER2 MAT:SIO2 THI:2um IND:1.46 \END LAYER2 \LAYER3 MAT:SI BR:6.5um THI_Cross_Sect:0.226um WID_Cross_Sect:0.51um \END LAYER3 \TOP BER:1.0e-10 BL:0.0055dB BR:6.5um CG:0.2um DR:20Gbps LEN:16.0um OCL:1.7dB/cm Tau:10ps WID:16.0um WW:1.55um \END TOP