Enhanced spectral profile in the study of Doppler-broadened Rydberg ensembles
| Autor: | Yi-Hsin Chen, Ming-Shien Chang, Bo-Han Wu, Ite A. Yu, Ya-Wen Chuang, Jr-Chiun Yu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Atomic Physics (physics.atom-ph)
lcsh:Medicine FOS: Physical sciences 01 natural sciences Spectral line Article 010305 fluids & plasmas Physics - Atomic Physics symbols.namesake 0103 physical sciences Polariton Physics::Atomic Physics 010306 general physics lcsh:Science Physics Multidisciplinary lcsh:R Quantum Physics Intensity (physics) Qubit Rydberg atom Rydberg formula symbols lcsh:Q Atomic physics Doppler effect Order of magnitude |
| Zdroj: | Scientific Reports Scientific Reports, Vol 7, Iss 1, Pp 1-8 (2017) |
| ISSN: | 2045-2322 |
| Popis: | Combination of the electromagnetically-induced-transparency (EIT) effect and Rydberg-state atoms has attracted great attention recently due to its potential application in the photon-photon interaction or qubit operation. In this work, we studied the Rydberg-EIT spectra with room-temperature $^{87}$Rb atoms. Spectroscopic data under various experimental parameters all showed that the contrast of EIT transparency as a function of the probe intensity is initially enhanced, reaches a maximum value and then decays gradually. The contrast of spectral profile at the optimum probe field intensity is enhanced by $2-4$ times as compared with that at weak intensity. Moreover, the signal-to-noise ratio of the spectrum can potentially be improved by 1 or 2 order of magnitude. We provided a theoretical model to explain this behavior and clarified its underlying mechanism. Our work overcomes the obstacle of weak signal in the Rydberg-EIT spectrum caused by an apparent relaxation rate of the Rydberg polariton and weak coupling transition strength, and provides the useful knowledge for the Rydberg-EIT study. 9 pages, 5 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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