Optical computing without using optical elements
Arbab Ali Khan, Muhammad Suhail Zubairy · Pure and Applied Optics Journal of the European Optical Society Part A · 1998
We present an optical algorithm for parallel multiplication of vectors and matrices using simple grating structures. The proposed scheme has the advantage that it does not require optical elements. Light while passing through the spatial light modulators, consisting of grating structures, gets multiplied and summed at the output plane. The scheme has the flexibility to perform matrix operations without changing the hardware.