Seminarium Fizyki Ciała Stałego

Semiconductor quantum dots can be engineered in order to realize specific configurations relevant for light emission in classical sources, single photon emission for to quantum cryptography, optical manipulation of the qu-bit based on a confined carrier, or magnetic objects with adjustable anisotropy when dilute magnetic semiconductors are involved. Inserting a semiconductor with a small gap into a nanowire with a larger gap offers a particularly flexible way to associate materials with various values of the lattice mismatch and bandgap, in a quantum dot with widely adjustable shape and size, so that a precise engineering of the electron and hole wave functions is achieved. In this talk we will focus onto CdTe and (Cd,Mn)Te dots in ZnTe nanowires, from their design and their growth by molecular beam epitaxy, to the physics of the emission of light and the formation of a magnetic polaron based on the light-hole exciton. Figure(pdf file)