The anti-reflection structure includes a graded refractive index layer that is disposed on a substrate and whose refractive index decreases as a distance from the substrate increases, and a homogeneous layer that is disposed on the graded refractive index layer and whose refractive index is homogeneous. One or more control nodes provide for the efficient and automated allocation and management of computing functions and resources within the distributed computing system in accordance with the organization model. The license-downloading module is configured to download a first license from a license server to a computer. On a back surface of the semiconductor substrate, the back electrode is provided in electrical connection to the interconnect.