Here we report the direct observation of plasmonic edge modes or whispering gallery-type modes of nanoscale omni-directional disk antennas using near infrared three-photon PEEM. Our antennas are milled with a focused ion beam (FIB) from gold on copper composite films on indium tin oxide substrate (ITO) on glass. An ultrafast laser ([Lambda]0 = 800 nm) incident at 60° to the surface normal generates surface plasmons at the edges of the disks by diffraction.