University of Exeter

International Business Machines Corporation

Oxford University Innovation Limited

University of Muenster

Christopher David Wright

Abu Sebastian

Manuel Le Gallo-Bourdeau

Harish Bhaskaran

Wolfram Pernice

Nathan Youngblood

Xuan Li

Johannes Feldmann

Santiago Garcia-Cuevas Carrillo

A display is described which comprises a plurality of pixels (), wherein each pixel () comprises a plasmonic resonator () including first and second metallic material elements () and incorporating a layer () of a phase change material, the plasmonic resonator () being arranged such that in one material state of the phase change material () the electric field coupling between the second metallic material element () and the phase change material layer () is strong and so strong absorption of selected wavelengths of the incident light occurs, whereas in another state of the phase change material () the electric field coupling between the metallic material elements () and the phase change material layer (), and between the first and second metallic material elements () is weak and so re-radiation of incident light occurs, the pixel () being of high reflectance.

Display

A co-processor for performing a matrix multiplication of an input matrix with a data matrix in one step may be provided. The co-processor receives input signals for the input matrix as optical signals. A plurality of photonic memory elements is arranged at crossing points of an optical waveguide crossbar array. The plurality of memory elements is configured to store values of the data matrix. Input signals are connected to input lines of the optical waveguide crossbar array. Output lines of the optical waveguide crossbar array represent a dot-product between a respective column of the optical waveguide crossbar array and the received input signals, and values of elements of the input matrix to be multiplied with the data matrix correspond to light intensities received at input lines of the respective photonic memory elements. Additionally, different wavelengths are used for each column of the input matrix optical signals.

Photonic in-memory co-processor for convolutional operations

Growing community of inventors

Lympstone, United Kingdom

Christopher David Wright