Controlling Optical Bistability in a Five-level Cascade EIT Medium

Phan Van Thuan, Ta Tram Anh, Le Canh Trung, Nguyen Tien Dung, Luong Thi Yen Nga, Dinh Xuan Khoa, Le Van Doai, Nguyen Huy Bang, Nguyen Van Ai

Abstract


Optical bistability (OB) of an electromagnetically induced transparency (EIT) medium placed in a conventional unidirectional ring cavity is investigated numerically. The medium is excited by a coupling and probe laser lights via a five-level cascade scheme. It is shown that optical bistabe states with controllable switching threshold intensities and width are established simultaneously in three spectral regions corresponding to EIT windows. The current numerical result is compared to a previous analytical result showing influence of coherence terms neglected in the analytical model.

Keywords


optical bistability, electromagnetically induced transparency, coherent optical effects

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DOI: https://doi.org/10.15625/0868-3166/26/1/8213 Display counter: Abstract : 459 views. PDF : 117 views.

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