[9a-Z23-1~6] 4.2 Photonics Devices, Photonic Integrated Circuit and Silicon Photonics

▲ [9a-Z23-6] [INVITED]Progress in Linear Optical Operation Gates and Circuits in Si Photonics Towards Photoelectronic Converged Accelerators

〇Shota Kita^1,2, Kengo Nozaki^1,2, Kenta Takata^1,2, Akihiko Shinya^1,2, Guangwei Cong³, Noritsugu Yamamoto³, Keijiro Suzuki³, Yuriko Maegami³, Morifumi Ohno³, Koji Yamada³, Masaya Notomi^1,2 (1.NTT Nanophotonics Center, 2.NTT BRL, 3.AIST)

Keywords:linear optical logic gates, photonic digital analog converters, nanophotonics

Our group has been consistently developing nanophotonic components to realize more dense photoelectronic converged accelerators. And around 5 years ago, our group has also suggested “photonic pass gate logic” to achieve ultralow latency operations. The minimization of the photonic pass length is required to realize ultralow latency, so it is suitable to utilize nanophotonics.
At the same time, nonlinear conversions are essential for universal operations. However, there are still many drawbacks in nonlinear photonic gates in terms of length (latency) and loss. So our group has focused on linear optical components because they can perform almost energy less analog linear conversions. In this talk, we summarize the topics for optical Boolean logic operation using Si “psai” gates and digital/analog conversion based on circuit topology, which could be one of key elements to justify the photonic analog processing (multiply-accumulate operations) in artificial neural networks.