Optically Induced Rotation of an Exciton Spin in a Semiconductor Quantum Dot
Optically Induced Rotation of an Exciton Spin in a Semiconductor Quantum Dot
We demonstrate control over the spin state of a semiconductor quantum dot exciton using a polarized picosecond laser pulse slightly detuned from a biexciton resonance. The control pulse follows an earlier pulse, which generates an exciton and initializes its spin state as a coherent superposition of its two nondegenerate eigenstates. …