Si-based On-chip Optical Interconnects Shang Wang ECE423 12/16/06

Disadvantages of Electrical Interconnects Scaling Problem —— ”Aspect Ratio” Limit However, optical interconnects do not have such problem!

Other Advantages of Optical Interconnects Timing Accuracy Design Simplification voltage isolation Absence of wave reflection and impedance matching avoid inductive crosstalk frequency independence

On-chip Optical Interconnect Data Path Silicon Optical Modulator Si-based Photo Detector Silicon Laser Silicon Waveguide Driver Amplifier Electrical Logic Cell Electrical Logic Cell

Simulated Raman Scattering (SRS) Si-based Light Source ——Raman Silicon Laser Simulated Raman Scattering (SRS) A reversely biased p-i-n diode to eliminate the TPA-induced FCA

Silicon Optical Modulator metal-oxide-semiconductor (MOS) capacitor Mach-Zehnder Interferometer (MZI)

Si-based Photo detector SiGe multiple quantum wells (MQW)

Conclusion The concept of optical interconnect brings a brilliant future for the dense interconnects to the silicon chips. The recent achievement in Intel of the silicon laser, silicon optical modulator and silicon-based photodetector shows the potential of monolithic integration of silicon-based optoelectronics.

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