Optoelectronics: Coupling lasers using photonic crystals

3D rendering of a photonic crystal vertical-cavity surface-emitting laser.

3D rendering of a photonic crystal vertical-cavity surface-emitting laser.

Abstract:
Large arrays of vertical laser sources need to emit a coherent output of light. This can be achieved through photonic crystals that mediate the interaction between the lasers in the array.
J. Witzens and A. Scherer, Coupling lasers using photonic crystals (News and Views), Nature Materials 4, 512-513 (2005).