Quantum dots are tiny semiconductor particles with discrete electronic states, which is why they are sometimes called artificial atoms. When excited by light, they can emit photons at precise colors.

The image accompanied a Joint Quantum Institute story about quantum dots and future optical technologies.

The surface landscape was built from actual atomic-force microscope data, used as a displacement texture for the 3D scene. I added glowing emission points and photon paths to make the artificial-atom analogy visible without turning the image into a diagram.