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We propose a tunable electro-optic modulator using high-index contrast Si-SiO2 ring resonators on silicon-on-insulator (SOI) substrate. Optical modulation is achieved using plasma dispersion effect due to current injection under forward bias of a p-i-n junction. A steady state on-off ratio of 90% at 775MHz is achievable with the proposed optical modulation scheme.
© 2004 Optical Society of America
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