Negative Refractive Index in an Inhomogeneously Broadened Four-Level Inverted-Y Atomic Medium

被引：2

作者：

Bang, Nguyen Huy ^{[1
]}

Van Phu, Nguyen ^{[1
]}

Sau, Vu Ngoc ^{[1
]}

Cong, Nguyen Thanh ^{[1
]}

Van Doai, Le ^{[1
]}

机构：

[1] Vinh Univ, Dept Phys, Vinh City 460000, Vietnam

来源：

IEEE PHOTONICS JOURNAL | 2021年 / 13卷 / 06期

关键词：

Negative refractive index; electromagnetically induced transparency; doppler broadening; ELECTROMAGNETICALLY INDUCED TRANSPARENCY; LIGHT;

D O I：

10.1109/JPHOT.2021.3119985

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, we present the study on negative refractive index in an inhomogeneously broadened four-level inverted-Y atomic medium based on electromagnetically induced transparency (EIT). The expressions of the relative permittivity and the relative permeability are derived under Doppler broadening. For this four-level system, we have found two frequency bands of negative refractive index in an optical region corresponding to two EIT windows. The influences of coupling and signal laser fields as well as temperature on frequency bands of negative refractive index are investigated. Our research can be convenient for experimental implementation with real atomic media under different temperatures.

引用

页码：1 / 7

页数：7

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