Magnetic near-field distribution measurements over finite meander circuit patterns by fiber-optic magneto-optic probe

For an optimum design of today's fine, complicated SLIs and PCBs, it is considered indispensable to apply electromagnetic near-field probing technique with low-invasiveness and high-spatial resolution. In this study, we have evaluated spatial resolutions and measurable bandwidths of the fiber-edge magneto-optic (FEMO) probes with a MO crystal of an around 10 /spl mu/m thickness. We fabricated two kinds of probes that utilize the Faraday effects caused by a domain wall displacement phenomenon and that by a rotation magnetization (RM) phenomenon, respectively. It turned out that the RM-based probe could distinguish a magnetic field generated from each line of a 10 /spl mu/m-scale meander circuit and had measurable bandwidth of around 2.5 GHz. Furthermore, by applying the RM-based probe, magnetic near-field mappings over finite circuits were realized in the GHz range. We confirmed the validness of those by the simulations using an electromagnetic field simulator.