Figure 3
From: Local oscillator port embedded field enhancement resonator for Rydberg atomic heterodyne technique
Simulated E-field distribution for a 638 MHz incident source. The energy captured by the resonator, in addition to resonating between the gap, is absorbed by matched loads connected by two symmetrical PPWG antennas through spatial coupling. The upper panel shows the E-field distribution along the optical beam path (white dashed line in the lower panel), with the vertical dashed lines delineating the vapor cell location. The black lines delineate the copper plate of the resonator