Subnatural linewidth using electromagnetically induced transparency in Doppler-broadened vapor

Abstract

We obtain subnatural linewidth (i.e. $<\Gamma$) for probe absorption in room-temperature Rb vapor using electromagnetically induced transparency (EIT) in a $\Lambda$ system. For stationary atoms, the EIT dip for a resonant control laser is as wide as the control Rabi frequency ${\Omega }_c$. But in thermal vapor, the moving atoms fill the transparency band so that the final EIT dip remains subnatural even when ${\Omega }_c>\Gamma$. We observe linewidths as small as $\Gamma /7$ in the $D_2$ line of Rb.

6 pages, 7 figures

References in corpus (2)

• Coherent optical detection of highly excited Rydberg states using electromagnetically induced transparency
• Precise measurement of hyperfine intervals using avoided crossing of dressed states

Cited by in corpus (8)

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• Role of dressed-state interference in electromagnetically induced transparency
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• Linear and nonlinear magneto-optical rotation on the narrow strontium intercombination line
• Wavelength mismatch effect in electromagnetically induced absorption
• Resolution of hyperfine transitions in metastable 83Kr using Electromagnetically Induced Transparency
• Probing an excited-state atomic transition using hyperfine quantum beat spectroscopy