STUDY OF NEGATIVE REFRACTIVE INDEX IN Rb FOUR-LEVEL N-TYPE ATOMIC GAS MEDIUM

In this work, we study the generation of a negative refractive index based on electromagnetically induced transparency (EIT) in a Rb four-level N-type atomic gas medium. We derive analytic expressions for the relative permittivity and relative permeability of the medium according to the parameters o...

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Những tác giả chính:	Nguyen, Huy Bang, Le, Nguyen Mai Anh, Le, Thi Minh Phuong, Ho, Hai Quang, Le, Van Doai
Định dạng:	Bài viết
Ngôn ngữ:	English
Được phát hành:	Trường Đại học Đà Lạt 2023
Truy cập trực tuyến:	https://tckh.dlu.edu.vn/index.php/tckhdhdl/article/view/1028 https://scholar.dlu.edu.vn/thuvienso/handle/DLU123456789/114492
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spelling	oai:scholar.dlu.edu.vn:DLU123456789-1144922023-10-27T14:47:39Z STUDY OF NEGATIVE REFRACTIVE INDEX IN Rb FOUR-LEVEL N-TYPE ATOMIC GAS MEDIUM Nguyen, Huy Bang Le, Nguyen Mai Anh Le, Thi Minh Phuong Ho, Hai Quang Le, Van Doai In this work, we study the generation of a negative refractive index based on electromagnetically induced transparency (EIT) in a Rb four-level N-type atomic gas medium. We derive analytic expressions for the relative permittivity and relative permeability of the medium according to the parameters of the probe, pump, and signal laser fields. We then investigate the variation of the real parts of the relative permittivity and relative permeability with respect to the intensity and frequency of the pump and signal laser fields. In the presence of the pump laser beam, the medium becomes transparent to the probe laser beam even in the resonant region. At the same time, the real parts of the relative permittivity and relative permeability are simultaneously negative (i.e., the medium exhibits a negative refractive index) in the EIT spectral domain. In the presence of the signal laser beam, the EIT effect occurs over two different frequency domains of the probe beam, so a negative refractive index is also generated in these two frequency domains. The investigation of the real parts of the relative permittivity and relative permeability with intensity and frequency of the pump and signal laser fields allowed us to find the laser parameters for the appearance of the negative refractive index, which can be useful for experimental observations. 2023-03-04T14:14:21Z 2023-03-04T14:14:21Z 2023 Article 0866-787X https://tckh.dlu.edu.vn/index.php/tckhdhdl/article/view/1028 https://scholar.dlu.edu.vn/thuvienso/handle/DLU123456789/114492 10.37569/DalatUniversity.13.1.1028(2023) en Tạp chí Khoa học Đại học Đà Lạt, Tập 13, Số 1; tr. 45-58 application/pdf Trường Đại học Đà Lạt
institution	Thư viện Trường Đại học Đà Lạt
collection	Thư viện số
language	English
description	In this work, we study the generation of a negative refractive index based on electromagnetically induced transparency (EIT) in a Rb four-level N-type atomic gas medium. We derive analytic expressions for the relative permittivity and relative permeability of the medium according to the parameters of the probe, pump, and signal laser fields. We then investigate the variation of the real parts of the relative permittivity and relative permeability with respect to the intensity and frequency of the pump and signal laser fields. In the presence of the pump laser beam, the medium becomes transparent to the probe laser beam even in the resonant region. At the same time, the real parts of the relative permittivity and relative permeability are simultaneously negative (i.e., the medium exhibits a negative refractive index) in the EIT spectral domain. In the presence of the signal laser beam, the EIT effect occurs over two different frequency domains of the probe beam, so a negative refractive index is also generated in these two frequency domains. The investigation of the real parts of the relative permittivity and relative permeability with intensity and frequency of the pump and signal laser fields allowed us to find the laser parameters for the appearance of the negative refractive index, which can be useful for experimental observations.
format	Article
author	Nguyen, Huy Bang Le, Nguyen Mai Anh Le, Thi Minh Phuong Ho, Hai Quang Le, Van Doai
spellingShingle	Nguyen, Huy Bang Le, Nguyen Mai Anh Le, Thi Minh Phuong Ho, Hai Quang Le, Van Doai STUDY OF NEGATIVE REFRACTIVE INDEX IN Rb FOUR-LEVEL N-TYPE ATOMIC GAS MEDIUM
author_facet	Nguyen, Huy Bang Le, Nguyen Mai Anh Le, Thi Minh Phuong Ho, Hai Quang Le, Van Doai
author_sort	Nguyen, Huy Bang
title	STUDY OF NEGATIVE REFRACTIVE INDEX IN Rb FOUR-LEVEL N-TYPE ATOMIC GAS MEDIUM
title_short	STUDY OF NEGATIVE REFRACTIVE INDEX IN Rb FOUR-LEVEL N-TYPE ATOMIC GAS MEDIUM
title_full	STUDY OF NEGATIVE REFRACTIVE INDEX IN Rb FOUR-LEVEL N-TYPE ATOMIC GAS MEDIUM
title_fullStr	STUDY OF NEGATIVE REFRACTIVE INDEX IN Rb FOUR-LEVEL N-TYPE ATOMIC GAS MEDIUM
title_full_unstemmed	STUDY OF NEGATIVE REFRACTIVE INDEX IN Rb FOUR-LEVEL N-TYPE ATOMIC GAS MEDIUM
title_sort	study of negative refractive index in rb four-level n-type atomic gas medium
publisher	Trường Đại học Đà Lạt
publishDate	2023
url	https://tckh.dlu.edu.vn/index.php/tckhdhdl/article/view/1028 https://scholar.dlu.edu.vn/thuvienso/handle/DLU123456789/114492
_version_	1781718690558902272

STUDY OF NEGATIVE REFRACTIVE INDEX IN Rb FOUR-LEVEL N-TYPE ATOMIC GAS MEDIUM

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