Spontaneous Two-Photon Emission from a Single Quantum Dot
Spontaneous Two-Photon Emission from a Single Quantum Dot
Spontaneous two-photon emission from a solid-state single quantum emitter is observed. We investigated photoluminescence from the neutral biexciton in a single semiconductor quantum dot coupled with a high $Q$ photonic crystal nanocavity. When the cavity is resonant to the half energy of the biexciton, the strong vacuum field in the …