Electromagnetically induced transparency and electromagnetically induced absorption in Y-type system

doi:10.1088/1674-1056/ab7ea0

Abstract The propagation of a probe field through a four-level Y-type atomic system is described in the presence of two additional coherent radiation fields, namely, the control field and the coupling field. An expression for the probe response is derived analytically from the optical Bloch equations under steady state condition to study the absorptive properties of the system under probe field propagation through an ensemble of stationary atoms as well as in a Doppler broadened atomic vapor medium. The most striking result is the conversion of electromagnetically induced transparency (EIT) into electromagnetically induced absorption (EIA) as we start switching from weak probe regime to strong probe regime. The dependence of this conversion on residual Doppler averaging due to wavelength mismatch is also shown by choosing the coupling transition as a Rydberg transition.

Keywords: Y-type system density matrix method electromagnetically induced transparency (EIT) electromagnetically induced absorption (EIA)

Received: 19 February 2020
Revised: 03 March 2020
Accepted manuscript online:

PACS:	42.50.Gy	(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
	32.10.Fn	(Fine and hyperfine structure)

Corresponding Authors: Amitava Bandyopadhyay
E-mail: m2amitava@gmail.com

Cite this article:

Kalan Mal, Khairul Islam, Suman Mondal, Dipankar Bhattacharyya, Amitava Bandyopadhyay Electromagnetically induced transparency and electromagnetically induced absorption in Y-type system 2020 Chin. Phys. B 29 054211

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[2]	Vapor cell geometry effect on Rydberg atom-based microwave electric field measurement Linjie Zhang(张临杰), Jiasheng Liu(刘家晟), Yue Jia(贾玥), Hao Zhang(张好), Zhenfei Song(宋振飞), Suotang Jia(贾锁堂). Chin. Phys. B, 2018, 27(3): 033201.
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[5]	Experimental observation of pump-probe spectra of caesium D₂ line with a vapour cell Wang Yan-Hua (王彦华), Yang Hai-Jing (杨海菁), Zhang Tian-Cai (张天才), Wang Jun-Min (王军民). Chin. Phys. B, 2005, 14(6): 1120-1124.
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Electromagnetically induced transparency and electromagnetically induced absorption in Y-type system

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