Two-channel optical bistability and multistability in a degenerate four-level atomic medium under a static magnetic field

In this paper, we study the formation of optical bistability (OB) and optical multistability (OM) in a degenerate four-level atomic system by an external magnetic field that is excited by a probe laser field, a coupling laser field and a signal laser field. The coupling field can cause electromagnet...

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Bibliographic Details
Published in:Scientific reports 2024-08, Vol.14 (1), p.19007-11
Main Authors: Hien, Nguyen Thi Thu, Dan, Nguyen Linh, Bang, Nguyen Huy, Khoa, Dinh Xuan, Van Phu, Nguyen, Anh, Nguyen Thi Lan, Huong, Mai Thi Thu, Nhung, Luong Thi Cam, Linh, Tran Thi Truc, Thuy, Le Thi, Chau, Nguyen Thi Yen, Anh, Le Nguyen Mai, Van Doai, Le
Format: Article
Language:English
Subjects:
639/301
639/624
Electrons
Humanities and Social Sciences
Lasers
Magnetic fields
multidisciplinary
Science
Science (multidisciplinary)
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Summary:In this paper, we study the formation of optical bistability (OB) and optical multistability (OM) in a degenerate four-level atomic system by an external magnetic field that is excited by a probe laser field, a coupling laser field and a signal laser field. The coupling field can cause electromagnetically induced transparency (EIT) for the probe field in the atomic medium, while the signal field and/or external magnetic field can switch between single-EIT and two-EIT regimes. Based on these properties, OB and OM effects can be formed at two different frequency regions of the probe field (two channels). By adjusting the magnetic field or the intensity and the frequency of laser fields, the threshold intensity and the width of OB or OM can also be changed simply. The model can be useful for experimental observations and applications in modern photonic devices .
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-68891-w