This work demonstrates higher-dimensional processing by harnessing the RF degree of freedom coupled with spatial and wavelength degree of freedom. This approach enables ultrahigh parallelism in photonic computing, magnifying its advantages in terms of throughputs, energy efficiency, and compute density. The materials used are silicon, silicon dioxide, gold, and phase change material GST. At this point, we have not done any analysis on sustainability, recyclability, or even the energy efficiency versus net benefit analysis, and these should for part of any larger sustainability analysis.