TAILIEUCHUNG - Electromagnetically induced transparency in the five level scheme of cold 85Rb atomic vapour

In the framework of the semiclassical theory, we develop an analytical approach on electromagnetically induced transparency (EIT) in the medium that consists of the ve-level cascade scheme of cold 85Rb atoms. In the weak eld limit of the probe light, an analytical representation of EIT spectra has been derived for the rst time. Signatures of EIT spectra, including transparency e ciency, have been investigated. Our theoretical results agree well with experimental observations. | Communications in Physics, Vol. 23, No. 2 (2013), pp. 163-170 ELECTROMAGNETICALLY INDUCED TRANSPARENCY IN THE FIVE-LEVEL SCHEME OF COLD 85 Rb ATOMIC VAPOUR BUI THI HONG HAI, LE VAN DOAI, DOAN HOAI SON, DINH XUAN KHOA, AND NGUYEN HUY BANG Vinh University, 182 Le Duan Street, Vinh City, Vietnam PHAM VAN TRONG Vinh University, 182 Le Duan Street, Vinh City, Vietnam and No 565 Quang Trung street, Dong Ve ward, Thanh Hoa City, Vietnam LE THI MINH PHUONG Phu Lam Technical and Economic College, Ho Chi Minh City, Vietnam NGUYEN TUAN ANH Ho Chi Minh City University of Food Industry, Ho Chi Minh City, Vietnam E-mail: bangvinhuni@ Received 09 June 2013 ; revised manuscript received 28 June 2013 Accepted for publication 30 June 2013 In the framework of the semiclassical theory, we develop an analytical approach on electromagnetically induced transparency (EIT) in the medium that consists of the ve-level cascade scheme of cold 85 Rb atoms. In the weak eld limit of the probe light, an analytical representation of EIT spectra has been derived for the rst time. Signatures of EIT spectra, including transparency e ciency, have been investigated. Our theoretical results agree well with experimental observations. Abstract. I. INTRODUCTION Electromagnetically induced transparency (EIT) is a quantum interference e ect which makes a resonance medium transparent and steep dispersive for a probe light eld under induction of other strong coupling light eld. The e ect was introduced theoretically in 1990 [1] and experimentally veri ed in 1991 [2]. Since then, EIT has attracted a tremendous interest over the last years due to its unusual properties and promising potential applications, such as all optical switching [3], slow-light group velocity [4], quantum information [5], nonlinear optics at low light level [6], enhancement of Kerr nonlinearity [7], and high resolution spectroscopy [8]. Several reviews on progress in EIT e ects and related applications are available .

• Vật lý
• Communications in Physics
• Electromagnetically induced transparency
• The five level scheme
• Cold 85Rb atomic vapour
• The semiclassical theory
• Electromagnetically induced transparency
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