Related papers: Temporal Spinwave Fabry-Perot Interferometry via Coherent Population Trapping

Temporal Spinwave Fabry-Perot Interferometry via Coherent Population Trapping

URL: http://arxiv.org/abs/2008.12562v2
Date: Mon, 8 Feb 2021 03:15:30 GMT
Title: Temporal Spinwave Fabry-Perot Interferometry via Coherent Population Trapping
Authors: Ruihuan Fang, Chengyin Han, Xunda Jiang, Yuxiang Qiu, Yuanyuan Guo, Minhua Zhao, Jiahao Huang, Bo Lu, Chaohong Lee
Abstract summary: We experimentally demonstrate a temporal spinwave Fabry-P'erot interferometry via double-$Lambda$ CPT of laser-cooled $87$Rb atoms. The transmission spectrum is analytically explained by the Fabry-P'erot interferometry of temporal spinwaves.
Score: 3.5655801623185663
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Ramsey spectroscopy via coherent population trapping (CPT) is essential in precision measurements. The conventional CPT-Ramsey fringes contain numbers of almost identical oscillations and so that it is difficult to identify the central fringe. Here, we experimentally demonstrate a temporal spinwave Fabry-P\'{e}rot interferometry via double-$\Lambda$ CPT of laser-cooled $^{87}$Rb atoms. Due to the constructive interference of temporal spinwaves, the transmission spectrum appears as a comb of equidistant peaks in frequency domain and thus the central Ramsey fringe can be easily identified. From the optical Bloch equations for our five-level double-$\Lambda$ system, the transmission spectrum is analytically explained by the Fabry-P\'{e}rot interferometry of temporal spinwaves. Due to small amplitude difference between the two Land\'{e} factors, each peak splits into two when the external magnetic field is not too weak. This peak splitting can be employed to measure an unknown magnetic field without involving magneto-sensitive transitions.

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