Silicon-based Fano resonance devices based on photonic crystal nanobeams

To address the driving power and density of wavelength-division-multiplexing(WDM)computing architectures,a Fano resonator based on a photonic crystal nanobeam is proposed.The Fano resonator comprises a T-shaped waveguide,introducing an additional phase shift in the continuous propagation mode,and a photonic crystal nanobeam with a discrete mode.The device has one resonance peak within wavelength ranging from 1500 nm to 1600 nm,with a maximum extinction ratio of 8.7 dB and a transmission spectrum slope of up to 11.30 dB/nm.The device has good reusability,extinction ratio,and spectral resolution.It is expected to provide essential photonic components for low-energy consumption and high-density photonic computing to meet the requirements of future convolutional neural network(CNN)acceleration computing.