A Photoconductor refers to a semiconductor material that exhibits a change in electrical conductivity when exposed to light. In the reported multiterminal photodetection device, the photoconductor’s responsivity measurements indicate how effectively the device converts light into an electrical signal. The ability of the photoconductor to track relative terminal lengths suggests its application in compact optoelectronic devices, such as taps and diplexers.

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Multi-terminal Germanium Photodetector in a Commercial Silicon Photonics Platform

We report responsivity measurements of a multiterminal photodetection device in a commercial silicon photonics platform. The ratio of measured responsivities is found to track the relative terminal lengths. This can serve as a highly compact optoelectronic tap/diplexer. More importantly, complex biasing conditions of similar devices are promising for onchip reprogrammable opto-electronic responses in conventional silicon photonic platforms, with applications in reprogrammable photonics and neuromorphic photonics.