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Keeler, G. A., Campione, S., Wood, M. G., Serkland, D. K., Parameswaran, S., Ihlefeld, J., Luk, T. S., Wendt, J. R., Geib, K. M..  2017.  Reducing optical confinement losses for fast, efficient nanophotonic modulators. 2017 IEEE Photonics Society Summer Topical Meeting Series (SUM). :201–202.

We demonstrate high-speed operation of ultracompact electroabsorption modulators based on epsilon-near-zero confinement in indium oxide (In$_\textrm2$$_\textrm3$\$) on silicon using field-effect carrier density tuning. Additionally, we discuss strategies to enhance modulator performance and reduce confinement-related losses by introducing high-mobility conducting oxides such as cadmium oxide (CdO).