Self-electro-optic device based on a superlattice asymmetric Fabry–Perot modulator with an on/off ratio ≳100:1

Abstract

A self-electro-optic effect device based on a Fabry–Perot reflection modulator has been demonstrated for the first time. This modulator is a normally-off high-contrast asymmetric Fabry–Perot modulator using Wannier–Stark localization in a superlattice. Optical bistability has been achieved with a record-high on/off ratio of 130:1 at the operating wavelength of 7620 Å. The modulator with an appropriate reverse-bias voltage supply was connected in series to a silicon photodiode which when illuminated with an appropriate light source acted as a current source load for the modulator.