We investigate detection of magnetic data using magnetooptical indicatorswith in-plane magnetization. A simple model for the magnetooptical detectionsystem is presented. We find that the signal to noise ratio changes stronglywith the bit size, the polarization noise and the distance between the magneticcarrier and the indicator. In particular, it is found that within our model asignal to noise ratio of 30 is possible for a bit size of 200 nm. We alsoestimate the resolution of the system, and find that a spot size of $\sim 200$nm can be obtained using a suitably designed solid immersion lens. Finally, wediscuss detection of several magnetic tracks simultaneously.
展开▼
