Mid infrared two-photon absorption in a room-temperature extended-wavelength InGaAs photodetector

Marco Piccardo, Noah A. Rubin, Lauren Meadowcroft +4

We investigate the nonlinear optical response of a commercial extended-wavelength In${}_{0.81}$Ga${}_{0.19}$As photodetector. Degenerate two-photon absorption in the mid-infrared range…