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Wavelength dependence four-wave mixing spectroscopy in a micrometric atomic vapour |
| Li Yuan-Yuan(李院院)a)b)†, Li Li(李莉)a), Zhang Yan-Peng(张彦鹏)c), and Bi Si-Wen(毕思文)b) |
| a Institute of Optics & Electronics, Department of Physics, Xi'an University of Arts and Science, Xi'an 710065, China; b State Key Laboratory of Transient Optics and Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068, China; c Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China |
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Abstract This paper presents a theoretical study of wavelength dependence four-wave-mixing (FWM) spectroscopy in a micrometric thin atomic vapour. It compares three cases termed as mismatched case I, matched case and mismatched case II for the probe wavelength less, equal and greater than the pump wavelength respectively. It finds that Dicke-narrowing can overcome width broadening induced by Doppler effects and polarisation interference of thermal atoms, and high resolution FWM spectra can be achieved both in matched and mismatched wavelength for many cases. It also finds that the magnitude of the FWM signal can be dramatically modified to be suppressed or to be enhanced in comparison with that of matched wavelength in mismatched case I or II. The width narrowing and the magnitude suppression or enhancement can be demonstrated by considering enhanced contribution of slow atoms induced by atom-wall collision and transient effect of atom-light interaction in a micrometric thin vapour.
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Received: 28 January 2010
Revised: 09 March 2010
Accepted manuscript online:
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| Fund: Project supported from the Major Program of Science Foundation of Xi'an University of Arts and Science. |
Cite this article:
Li Yuan-Yuan(李院院), Li Li(李莉), Zhang Yan-Peng(张彦鹏), and Bi Si-Wen(毕思文) Wavelength dependence four-wave mixing spectroscopy in a micrometric atomic vapour 2010 Chin. Phys. B 19 090702
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