High-resolution antenna near-field imaging and sub-THz measurements with a small atomic vapor-cell sensing element
Physics and Astronomy
2018 11th global symposium on millimeter waves, GSMM 2018
Atomic sensing and measurement of millimeterwave (mmW) and THz electric fields using quantum-optical EIT spectroscopy of Rydberg states in atomic vapors has garnered significant interest in recent years towards the development of atomic electric-field standards and sensor technologies. Here we describe recent work employing small atomic vapor cell sensing elements for near-field imaging of the radiation pattern of a Ku-band horn antenna at 13.49 GHz. We image fields at a spatial resolution of λ/10 and measure over a 72 to 240 V/m field range using off-resonance AC-Stark shifts of a Rydberg resonance. The same atomic sensing element is used to measure sub-THz electric fields at 255 GHz, an increase in mmW-frequency by more than one order of magnitude. The sub-THz field is measured over a continuous ±100 MHz frequency band using a near-resonant mmW atomic transition.
Link to Published Version
Anderson, D. A., Paradis, E., Raithel, G., Sapiro, R. E., & Holloway, C. L. (2018). High-resolution antenna near-field imaging and sub-THz measurements with a small atomic vapor-cell sensing element. 2018 11th global symposium on millimeter waves (GSMM) , 1–3. https://doi.org/10.1109/GSMM.2018.8439437