Dileptons at RHIC

This invited talk provides an overview of the results of the dilepton production at RHIC from PHENIX and STAR experiments. Sources of dileptons interesting to us are decay products from the virtual photon from QGP thermal radiation and in-medium vector meson. Dominant background sources are photon conversion in detector material, heavy-flavor decays, Dalitz decays from mesons and vector-meson decays in vacuum. Over the last decade, both experiments have been constantly improving their detector capabilities and analysis techniques. In addition, RHIC has produced Au+Au collisions with good statistics for dilepton physics from top SPS to top RHIC energies. I will present the recent results on dilepton yields as a function of beam energy, invariant mass, pair transverse momentum and collision reaction plane. Future measurements with combination of electrons and muons enable us to assess the contribution from correlated charm pair at the intermediate mass range and to subtract this ``irreducible'' background. I will discuss the specific properties of strongly interacting medium these measurements are sensitive to.