Micromagnetoluminescence on ferromagnet-semiconductor hybrid nanostructures

We present a magneto-optical approach for probing the optical response of a diluted magnetic semiconductor to the fringe field of nanostructured ferromagnets with sub-mum spatial resolution. Scanning across a CdZnMnSe/ZnSe quantum well covered by a single 700 nm wide dysprosium (Dy) wire a redshift of the magnetoluminescence signal is found beneath the ferromagnetic stripe. This on one hand demonstrates the strength of our experimental technique and on the other hand gives an indication of a local band gap modulation due to the giant Zeeman effect caused by the fringe field of ferromagnetic nanostructures. (C) 2004 American Institute of Physics.