title: Two-photon photovoltaic effect in gallium arsenide.
abstract: The two-photon photovoltaic effect is demonstrated in gallium arsenide at 976 and 1550 nm wavelengths. A waveguide-photodiode biased in its fourth quadrant harvests electrical power from the optical energy lost to two-photon absorption. The experimental results are in good agreement with simulations based on nonlinear wave propagation in waveguides and the drift-diffusion model of carrier transport in semiconductors. Power efficiency of up to 8% is theoretically predicted in optimized devices.
authors.forename: Jichi
authors.initials: J
authors.lastname: Ma
authors.forename: Jeff
authors.initials: J
authors.lastname: Chiles
authors.forename: Yagya D
authors.initials: YD
authors.lastname: Sharma
authors.forename: Sanjay
authors.initials: S
authors.lastname: Krishna
authors.forename: Sasan
authors.initials: S
authors.lastname: Fathpour