Terahertz electrometry via infrared spectroscopy of atomic vapor

Here a system of electrometry in which a THz signal can be characterized is demonstrated using laser spectroscopy of highly excited (Rydberg) atomic states. The proof-of-principle measurements here reveal a minimum detectable THz electric field amplitude of 1.07 \pm 0.06 \mathrm{~V} / \mathrm{m} at...

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Bibliographic Details
Main Authors: Chen, Shuying, Reed, Dominic J., MacKellar, Andrew R., Downes, Lucy A., Almuhawish, Nourah F. A., Jamieson, Matthew J., Adams, Charles S., Weatherill, Kevin J.
Format: Conference Proceeding
Language:English
Subjects:
Atomic beams
Atomic measurements
Electric potential
Millimeter wave measurements
Millimeter wave technology
Power measurement
Spectroscopy
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Summary:Here a system of electrometry in which a THz signal can be characterized is demonstrated using laser spectroscopy of highly excited (Rydberg) atomic states. The proof-of-principle measurements here reveal a minimum detectable THz electric field amplitude of 1.07 \pm 0.06 \mathrm{~V} / \mathrm{m} at 1.06THz with 3 \mathrm{~ms} detection time, corresponding to a THz power at the atomic cell of approximately 3.4nW. This method is applicable across the THz and millimeter-wave range. The relative simplicity and cryogen-free nature of this system makes it potential to provide a route to a SI traceable THz calibration technique and provide an alternative to calorimetric methods.
ISSN:2162-2035
DOI:10.1109/IRMMW-THz57677.2023.10298866