Enhancement of electromagnetically induced transparency and absorption signals in ⁸⁵Rb atomic vapor medium by using a small external magnetic field

Abstract

In the present work, a theoretical and experimental study to enhance electromagnetically induced transparency (EIT) and electromagnetically induced absorption (EIA) signals in an $^{85}{\rm{Rb}}$ atomic vapor medium at room temperature is conducted. Also, switching from EIT to EIA signal at a particular value of the magnetic field is observed. Further, by using circularly polarized coupling light, the dispersion profile of the linearly polarized probe signal is investigated theoretically and experimentally. The nine-level system of $^{85}{\rm{Rb}}$ D2 transition in a ladder-type configuration is fully solved by using the density matrix theory. The simulated results are found in good qualitative agreement with experimental observations. Hence, an experimental setup is developed for (1) achieving enhanced EIT and EIA signal, (2) switching from EIT to EIA, and (3) dispersion measurement. These observations have potential applications towards measurement of the group velocity of light, quantum memory, quantum information, and optical switching.

© 2021 Optical Society of America

Effects of vector magnetic field on electromagnetically induced transparency with lin ⊥ lin polarization

Bankim Chandra Das, Arpita Das, Dipankar Bhattacharyya, and Sankar De
J. Opt. Soc. Am. B 38(2) 584-594 (2021)

Transformation of Ramsey electromagnetically induced absorption into magnetic-field induced transparency in a paraffin-coated Rb vapor cell

Han Seb Moon and Ho-Jung Kim
Opt. Express 22(15) 18604-18611 (2014)

Effects of probe ellipticity and longitudinal magnetic field on the polarization rotation in a coherently prepared atomic medium

Arpita Das, Bankim Chandra Das, Dipankar Bhattacharyya, and Sankar De
OSA Continuum 4(1) 105-120 (2021)

Splitting of electromagnetically induced absorption signal in a five-level V-type atomic system

Khairul Islam, Amitava Bandyopadhyay, Bankim Chandra Das, Satyajit Saha, Sankar De, and Dipankar Bhattacharyya
J. Opt. Soc. Am. B 34(12) 2550-2557 (2017)

High resolution electromagnetically induced transparency spectroscopy of Rydberg ⁸⁷Rb atom in a magnetic field

H. Cheng, H. M. Wang, S. S. Zhang, P. P. Xin, J. Luo, and H. P. Liu
Opt. Express 25(26) 33575-33587 (2017)