Abstract
A dual-frequency light field scheme, composed of counterpropagating pump and probe light waves with equal circular polarizations and different intensities, is proposed for the detection of subnatural-linewidth electromagnetically induced absorption (EIA) resonances. In this scheme, the bright-type EIA resonance is obtained at fixed static magnetic field by tuning the frequency difference between both optical fields and can be used as a frequency reference in an atomic clock. Using a 5-mm long buffer-gas-filled Cs vapor cell, an EIA-based atomic clock with a short-term fractional frequency stability of 5.8 × 10-12τ-1/2 until 20 s integration time is reported. These performances are found to be in correct agreement with the signal-to-noise/linewidth ratio of the resonance. The proposed EIA scheme can be considered as an alternative approach to the coherent population trapping (CPT) technique for the development of compact atomic clocks and sensors.
Highlights
Quantum coherent superposition of atomic states created by the simultaneous interaction of two coherent light fields are extensively used in nonlinear spectroscopy [1] and find many exciting applications in quantum sensing, quantum information, laser cooling [2] and atomic devices [3]
We report a novel excitation scheme for the detection of subnatural-linewidth electromagnetically induced absorption (EIA) resonances on the cesium D1 line, adapted for atomic clock operation
We have proposed a dual-frequency optical field configuration scheme that allows the detection of narrow-linewidth EIA resonances in a buffer-gas filled alkali vapor cell
Summary
Quantum coherent superposition of atomic states created by the simultaneous interaction of two coherent light fields are extensively used in nonlinear spectroscopy [1] and find many exciting applications in quantum sensing, quantum information, laser cooling [2] and atomic devices [3] These phenomena, including mainly electromagnetically induced transparency (EIT) [4], coherent population trapping (CPT) [5, 6], electromagnetically induced absorption (EIA) [7] and other atomic three-level configurations [8], imply the creation of a specific non-absorbing (non-transmitting) quantum "dark" ("bright") state that yields the detection of narrow subnatural-linewidth dark (bright) resonances in the absorption profiles. This EIA scheme might be viewed as an alternative to CPT for the development of compact atomic clocks and quantum sensors
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
