Dubey, Satya K. and Rawat, Harish S.
(2019)
2-Dimensional sub-atomic localization of Rb Rydberg atoms for SI traceable E-field metrology.
In: URSI Asia-Pacific Radio Science Conference (AP-RASC), MAR 09-15, 2019, New Delhi, INDIA.
Abstract
In this work, Electromagnetically Induced Transparency (EIT) has been studied in a RF-driven four-level ladder 85 Rb atomic model. Rb atomic cell is simultaneously driven by three fields; two lasers, namely control and probe and one microwave. This spectroscopic technique of exposing atomic vapors to three energies may get established as a quantum primary standard for the RF electric-field amplitude metrology due to its dependency only on universal Plank's constant. It is observed that when right resonant frequency is achieved the absorption spectrum gives a transition to EIT by inducing a window in middle of the curve cancelling the absorption. In addition, two-dimensional localization of an atom is also studied in various field scenarios. The maxima of absorption spectrum can be modified by making slight modifications in the electromagnetic fields driving the system. Next step in the metrology would be of measuring vector E-field for which finding the position of an atom may play a crucial role. This may add one extra degree of freedom in the evaluation of SI traceable E-field.
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