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Physical Review A

Reply to "Comment on `Large enhancement of four-wave mixing by suppression of photon absorption from electromagnetically induced transparency' " (2 pages)

Joseph Saldana, Yunlong Wu

Published Jan 1, 2005• 0 citations
OpenAlex

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Reply to “Comment on ‘Large enhancement of four-wave mixing by suppression of photon absorption from electromagnetically induced transparency’ ”

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Comment on “Large enhancement of four-wave mixing by suppression of photon absorption from electromagnetically induced transparency”

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In this Comment we deal with a recent study of Ying Wu et al. [Phys. Rev. A 67, 013811 (2003)] on a four-wave mixing process. We show that the authors' claim, that a large enhancement of the generation efficiency can be obtained by suppression of photon absorption from electromagnetically induced transparency, is not correct.

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Large enhancement of four-wave mixing by suppression of photon absorption from electromagnetically induced transparency

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We analyze a four-wave-mixing (FWM) scheme in a five-level atomic system based on electromagnetically induced transparency (EIT). We show that EIT suppresses both two-photon and three-photon absorptions in the FWM scheme and enables the four-wave mixing to proceed through real, resonant intermediate states without absorption loss. The scheme results in a several orders of magnitude increase in the FWM efficiency in comparison with a recent scheme [Phys. Rev. Lett. 88, 143902 (2002)] and may be used for generating short-wavelength radiation at low pump intensities.

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Phase regulated suppression and enhancement switches of four-wave mixing and fluorescence

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We experimentally study the phase regulated switch between electromagnetically induced transparency and electromagnetically induced absorption in probe transmission signal and the conversion between enhancement and suppression in four-wave mixing and fluorescence signals for the first time. By changing the relative phase, electromagnetically induced transparency can be converted into electromagnetically induced absorption. In this process, the conversion from suppression to enhancement is also obtained in four-wave mixing and fluorescence signals. This research can be applied in non-linear optical device like optical switch and optical wavelength convertor.

Frontiers of Physics•Nov 4, 2013•5 citations
We analyze a four-wave-mixing (FWM) scheme in a five-level atomic system based on electromagnetically induced transparency (EIT). We show that EIT suppresses both two-photon and three-photon absorptions in the FWM scheme and enables the four-wave mixing to proceed through real, resonant intermediate states without absorption loss. The scheme results in a several orders of magnitude increase in the FWM efficiency in comparison with a recent scheme [Phys. Rev. Lett. 88, 143902 (2002)] and may be used for generating short-wavelength radiation at low pump intensities.
We experimentally study the phase regulated switch between electromagnetically induced transparency and electromagnetically induced absorption in probe transmission signal and the conversion between enhancement and suppression in four-wave mixing and fluorescence signals for the first time. By changing the relative phase, electromagnetically induced transparency can be converted into electromagnetically induced absorption. In this process, the conversion from suppression to enhancement is also obtained in four-wave mixing and fluorescence signals. This research can be applied in non-linear optical device like optical switch and optical wavelength convertor.