Recently, various types of digital/analog processings incorporating the features of light propagation are extensively researched for the reduction of energy and latency of computer. For the future, the collaboration of such photonic processings with CMOS electronic circuit should be key to configure a highly-integrated computing platform. However, the opto-electronic converters and optical nonlinear functions as the interface are currently the bottleneck due to their large energy consumption and size. This paper summarizes the development of these opto-electronic devices with ultralow-energy consumption down to femto-joule per bit level by using nanophotonic structures, and describes the expectation for a low-latency opto-electronic accelerator based on such integrable photonic components and circuits.
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