arXiv:1402.6275

Power broadening effects on Electromagnetically Induced Transparency in $^{20}$Ne vapor

Boaz Lubotzky, David Shwa, Tao Kong, Nadav Y. Katz, Guy Ron

Published Feb 25, 2014• 1 citation

Abstract

We report here the first observation of electromagnetically induced transparency (EIT) in $^{20}$Ne. The power broadening of the EIT linewidth is measured as a function of neon pressure and RF excitation power. Doppler effects on the EIT broadening are found even at low pressures and low intensities, where the linewidth should be governed only by homogeneous effects.

DOI: 10.48550/arxiv.1402.6275

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arXiv:1402.6275

Power broadening effects on Electromagnetically Induced Transparency in $^{20}$ Ne vaporPower broadening effects on Electromagnetically Induced Transparency in $^{20}$Ne vapor

Boaz Lubotzky, David Shwa, Tao Kong, Nadav Y. Katz, Guy Ron

Published Feb 25, 2014• 1 citation

arXiv HTML PDF

Abstract

We report here the first observation of electromagnetically induced transparency (EIT) in

^{20}

Ne. The power broadening of the EIT linewidth is measured as a function of neon pressure and RF excitation power. Doppler effects on the EIT broadening are found even at low pressures and low intensities, where the linewidth should be governed only by homogeneous effects.

DOI: 10.48550/arxiv.1402.6275

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Power broadening effects on Electromagnetically Induced Transparency in

^{20}

Ne vapor

We report here the first observation of electromagnetically induced transparency (EIT) in

^{20}

Rydberg-EIT of

^{85}

Rb vapor in a cell with Ne buffer gas

We investigate Rydberg electromagnetically induced transparency (EIT) of

^{85}

Rb atomic vapor in a glass cell that contains a 5-Torr neon buffer gas. At low probe power, EIT lines exhibit a positive frequency shift of about 70~MHz and a broadening of about 120~MHz, with minimal dependence on the principal quantum number of the Rydberg states. The EIT line shift arises from s-wave scattering between the Rydberg electron and the Ne atoms, which induces a positive shift near 190~MHz, and from the polarization of the Ne atoms within the Rydberg atom, which adds a negative shift near -120~MHz. The line broadening is largely due to the Ne polarization. Our experimental results are in good qualitative agreement with our theoretical model, in which the shift is linear in buffer-gas density. Our results suggest that Rydberg-EIT can serve as a direct spectroscopic probe for buffer-gas density at low pressure, and that it is suitable for non-invasive measurement of electric fields in low-pressure noble-gas discharge plasmas and in dusty plasmas.

{}^{85}\mathrm{Rb}

atomic vapor in a glass cell that contains a 5-Torr neon buffer gas. We find that at low probe power the

\mathrm{Ne}

buffer gas induces a positive frequency shift of the Rydberg-EIT lines of about 70 MHz as well as a broadening of about 120 MHz, with minimal dependence on the principal quantum number of the Rydberg states. The EIT line shift predominantly is a sum of a positive term from

s

-wave scattering between the Rydberg electron and the

\mathrm{Ne}

atoms, and a negative term from the polarization of the

\mathrm{Ne}

atoms within the Rydberg atom. The polarization shift is lesser in magnitude, resulting in the observed net positive shift. The line broadening is largely due to the

\mathrm{Ne}

polarization. Our experimental results are in good qualitative agreement with our theoretical model, in which the shift is linear in buffer-gas density. Our results suggest that Rydberg EIT is suitable for noninvasive measurement of electric fields in buffer-gas cells that sustain a plasma discharge, and that it can serve as a direct spectroscopic probe for buffer-gas density at low pressure.