P1–31: Enhancement and trajectory of field emission near the contact between metal and dielectric

We have investigated the enhanced field emission observed at the contact between metal and dielectric. To describe the dielectric effect on the enhancement, we consider a two-dimensional quadruple junction consisted of metal, vacuum, dielectric, and vacuum. It is found that both field and field emission are more enhanced in the quadruple junction than in the triple junction. The enhanced field can be strong enough to produce space charges in dielectric, which yields a favorable detour trajectory of field electrons.