Transforming a single pencil cactus (Euphorbia tirucalli) into a yard full of eye-catching greenery is a rewarding weekend project. These fast-growing succulent plants are fun thanks to their ...

Polaritons are hybrid particles made up of a photon strongly coupled to an electric dipole. Examples of such a dipole include an electron–hole pair in a semiconductor, which forms an exciton polariton ...

Semiconductor lasers use the optical properties of semiconducting materials to produce coherent light. Electrons and their positive-charge counterpart called holes are injected into an optically ...