Poster + Paper
18 June 2024 Scalable photonic tensor cores with out-of-plane phase change memory cell switching
Erik Jung, Lennart Meyer, Dominik Ditz, Wolfram H. P. Pernice
Author Affiliations +
Conference Poster
Abstract
By means of artificial intelligence (AI), the amount of data processed has experienced an unprecedented surge, necessitating advanced computational techniques and technologies. Simultaneously, the hardware responsible for processing this data must demonstrate energy efficiency while maintaining a compact design. Phase change material based photonic neuromorphic computing addresses these challenges by enabling energy efficient and fast in-memory computation with a high degree of parallelization. The input data, encoded optically, is channeled into an on-chip matrix multiplication setup capable of executing parallel Multiply-Accumulate (MAC) operations using multiple wavelengths. Central to this computation are the PCM cells, which alter their refractive index according to their crystalline state[1]. These PCM cells function as non-volatile on-chip memory units. Typically, the state of these PCM units is established optically, with additional in-plane inputs required for each matrix cell. However, our approach seeks to set the state of the PCM cell using a out-of-plane vertical-cavity surface-emitting laser (VCSEL) array positioned atop the photonic-logic matrix. This approach significantly enhances the design flexibility for large scale matrix-vector multiplications and therefore opens up new possibilities for efficient computation.
© (2024) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Erik Jung, Lennart Meyer, Dominik Ditz, and Wolfram H. P. Pernice "Scalable photonic tensor cores with out-of-plane phase change memory cell switching", Proc. SPIE 13012, Integrated Photonics Platforms III, 130120R (18 June 2024); https://doi.org/10.1117/12.3022195
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Switching

Vertical cavity surface emitting lasers

Matrices

Waveguides

Artificial intelligence

Circuit switching

Data processing

Back to Top