image credit: Christian Girard; image source; larger image
Roundup At the Optical Corral
Although this image looks like electron waves in an "atom corral," it's actually a theoretical optical corral--a prediction--with the waves representing quantum states of light. To learn more, see the American Physical Society's Physical Review Focus Roundup At the Optical Corral.
Waves and Photons
For further information on the photon, visit Waves and Photons from From Stargazers to Starships. (Start at the second section, "Electromagnetic Waves."). Also See Hyperphysics' Wave Particle Duality.