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• W4313612692 abstract "Abstract We investigate both experimentally and theoretically the cascade electromagnetically induced transparency (EIT) in <?CDATA $5S_{1/2}-5P_{3/2}-5D_{5/2}$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:mn>5</mml:mn> <mml:msub> <mml:mi>S</mml:mi> <mml:mrow> <mml:mn>1</mml:mn> <mml:mrow> <mml:mo>/</mml:mo> </mml:mrow> <mml:mn>2</mml:mn> </mml:mrow> </mml:msub> <mml:mo>−</mml:mo> <mml:mn>5</mml:mn> <mml:msub> <mml:mi>P</mml:mi> <mml:mrow> <mml:mn>3</mml:mn> <mml:mrow> <mml:mo>/</mml:mo> </mml:mrow> <mml:mn>2</mml:mn> </mml:mrow> </mml:msub> <mml:mo>−</mml:mo> <mml:mn>5</mml:mn> <mml:msub> <mml:mi>D</mml:mi> <mml:mrow> <mml:mn>5</mml:mn> <mml:mrow> <mml:mo>/</mml:mo> </mml:mrow> <mml:mn>2</mml:mn> </mml:mrow> </mml:msub> </mml:math> configuration in 87 Rb atomic vapor medium in the presence of vortex coupling Laguerre Gaussian (LG) light. We demonstrated Doppler free double resonance EIT structure in cascade configuration and observed transmission spectra for <?CDATA $vert Hrangle-vert Hrangle$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:mo fence=false stretchy=false>|</mml:mo> <mml:mi>H</mml:mi> <mml:mo fence=false stretchy=false>⟩</mml:mo> <mml:mo>−</mml:mo> <mml:mo fence=false stretchy=false>|</mml:mo> <mml:mi>H</mml:mi> <mml:mo fence=false stretchy=false>⟩</mml:mo> </mml:math> and <?CDATA $sigma^+-sigma^+$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msup> <mml:mi>σ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>−</mml:mo> <mml:msup> <mml:mi>σ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:math> polarized probe and coupling lights. We demonstrate that the double resonance structure can be identified by two photon transition probabilities and it is found to be <?CDATA $F^{^{primeprime}} = 2$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msup> <mml:mi>F</mml:mi> <mml:mrow> <mml:mi mathvariant=normal>′</mml:mi> <mml:mi mathvariant=normal>′</mml:mi> </mml:mrow> </mml:msup> <mml:mo>=</mml:mo> <mml:mn>2</mml:mn> </mml:math> and <?CDATA $F^{^{primeprime}} = 3$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msup> <mml:mi>F</mml:mi> <mml:mrow> <mml:mi mathvariant=normal>′</mml:mi> <mml:mi mathvariant=normal>′</mml:mi> </mml:mrow> </mml:msup> <mml:mo>=</mml:mo> <mml:mn>3</mml:mn> </mml:math> . By considering coupling LG light, several polarization combinations are taken into account, and their effects on amplifying and diminishing the EIT resonances are demonstrated experimentally. In order to understand the polarization effects of vortex coupling light on EIT spectrum in a degenerate multilevel atomic system, a theoretical model is developed by considering a simplified double hut level structure. Semi-classical density matrix analysis is used to understand the dynamics and also to establish the enhancement and reduction of EIT peak height with coupling light polarizations. The impact of two photon transition probabilities, polarization combinations and relative orientations of probe and coupling lights in degenerate multilevel atomic systems leads to modification of EIT resonances significantly. We establish quantitative agreement between our theory and experimental results." @default.
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• W4313612692 date "2023-01-01" @default.
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• W4313612692 title "Interplay of polarizations in a cascade EIT system in the presence of vortex coupling light in ⁸⁷Rb atomic vapor medium" @default.
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