Effect of residual Doppler averaging on the probe absorption in cascade type system: A comparative study

doi:10.1088/1674-1056/27/9/094204

中国物理B ›› 2018, Vol. 27 ›› Issue (9): 94204-094204.doi: 10.1088/1674-1056/27/9/094204

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Effect of residual Doppler averaging on the probe absorption in cascade type system: A comparative study

Suman Mondal, Arindam Ghosh, Khairul Islam, Dipankar Bhattacharyya, Amitava Bandyopadhyay

1 Department of Physics, Visva-Bharati, Santiniketan, PIN 731235, West Bengal, India;
2 Department of Physics, Santipur College, Santipur, PIN 741404, Nadia, West Bengal, India

收稿日期:2018-04-06 修回日期:2018-06-11 出版日期:2018-09-05 发布日期:2018-09-05
通讯作者: Suman Mondal, Arindam Ghosh, Amitava Bandyopadhyay E-mail:mondal.suman27@gmail.com;arindam.ghosh.phy@gmail.com;m2amitava@gmail.com
基金资助:
Project supported by UGC, New Delhi, India.

Effect of residual Doppler averaging on the probe absorption in cascade type system: A comparative study

Suman Mondal¹, Arindam Ghosh¹, Khairul Islam¹, Dipankar Bhattacharyya², Amitava Bandyopadhyay¹

1 Department of Physics, Visva-Bharati, Santiniketan, PIN 731235, West Bengal, India;
2 Department of Physics, Santipur College, Santipur, PIN 741404, Nadia, West Bengal, India

Received:2018-04-06 Revised:2018-06-11 Online:2018-09-05 Published:2018-09-05
Contact: Suman Mondal, Arindam Ghosh, Amitava Bandyopadhyay E-mail:mondal.suman27@gmail.com;arindam.ghosh.phy@gmail.com;m2amitava@gmail.com
Supported by:
Project supported by UGC, New Delhi, India.

摘要/Abstract

摘要：

Effect of residual Doppler averaging on the probe absorption in an alkali vapor medium in the presence of a coherent pump beam is studied analytically for the Ξ type system. A coherent probe field is assumed to connect the ground level with the intermediate level whereas a coherent control beam is supposed to act between the intermediate energy level and the uppermost level. Optical Bloch equations (OBE) for a three-level Ξ type system and a four-level Ξ type system are derived by using density matrix formalism. These equations are solved by an analytic method to determine the probe response, which not only depends on the wavelength difference between the control (pump) field and the probe field but shows substantially different features depending on whether the wavelength of the control field is greater than that of the probe field or the reverse. The effect of temperature on probe response is also shown. Enhancement in probe absorption and additional features are noticed under a strong probe limit at room temperature. The four-level Ξ type system has two ground levels and this leads to substantial modification in the simulated probe absorption as compared to the three-level system.

关键词: cascade type system, density matrix method, residual Doppler averaging, electromagnetically induced transparency (EIT)

Abstract:

Key words: cascade type system, density matrix method, residual Doppler averaging, electromagnetically induced transparency (EIT)

中图分类号: (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)

42.50.Gy

32.10.Fn (Fine and hyperfine structure)

Suman Mondal, Arindam Ghosh, Khairul Islam, Dipankar Bhattacharyya, Amitava Bandyopadhyay. Effect of residual Doppler averaging on the probe absorption in cascade type system: A comparative study[J]. 中国物理B, 2018, 27(9): 94204-094204.

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Effect of residual Doppler averaging on the probe absorption in cascade type system: A comparative study

Effect of residual Doppler averaging on the probe absorption in cascade type system: A comparative study

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