Abstract

High-extinction on–off modulators are essential for channel selection in integrated-optical sensor arrays. We report a standard SiON-technology-based electrostatically driven integrated mechano-optical waveguide on–off intensity modulator. On–off modulation is achieved by movement of an absorbing element into and out of the evanescent field of the guided mode. An extinction ratio of $>37 \mathrm{dB}$ at an actuation voltage of $<30 \mathrm{V}$ was achieved in a $6 \mathrm{mm}\times 4 \mathrm{mm}$ device for a wavelength of 632.8 nm. Full wafer-scale fabrication is made possible by use of chemical mechanical polishing and aligned wafer bonding.

© 1998 Optical Society of America

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