A Photodetector refers to a device that senses and measures light (or other electromagnetic radiation) and converts it into an electrical signal. The multiterminal photodetection device mentioned is designed to operate within a silicon photonics platform, allowing for responsivity measurements that indicate how effectively the device can detect light. The ability to track the ratio of measured responsivities relative to terminal lengths suggests that the photodetector can be optimized for compact designs, such as taps and diplexers.

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Multi-terminal Germanium Photodetector in a Commercial Silicon Photonics Platform

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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.

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