NDLI: Visible superfluorescence from optically pumped europium atoms

Content Provider	Springer Nature Link
Author	Bhattacharyya, S. Nakhate, S. G.
Copyright Year	2009
Abstract	We have observed superfluorescence (SF) on five atomic transitions at visible wavelengths 633.58, 635.00, 640.09, 640.61 and 736.22 nm in Doppler broadened gas of europium (Eu) atom. The nanosecond SF pulses were observed by longitudinally pumping Eu vapor column with a pulsed dye laser to upper states 4f65d6s2, 8D7/2at 346.79 nm and 4f75d6p, 10F5/2at 348.73 nm from the ground state 4f76s2, 8S7/2. High optical conversion efficiency ≈10% was measured for these SF transitions. Our experiment deals with the large sample multilevel SF in the regime where the length of the excited column L is greater than the maximum value of the Arecchi-Courtens length (Lc). The observed variation of SF peak intensity (Ifl) and time delay for SF evolution (τD) with number of atoms in the excited state (N) resemble theoretically predicted SF scaling laws for transverse excitation, namely Ifl∝N and $\tau_D \propto 1/{\sqrt N}$ although the experimental condition is similar to the swept excitation. This could be due to the Rabi frequency associated with the pump transition which is comparable to the SF delay time precluding the initiation of SF at different times along the sample and results in transverse (instantaneous) excitation. The experimental τD values were found to be in agreement with the quantum mechanical calculations describing SF.
Starting Page	9
Ending Page	15
Page Count	7
File Format	PDF
ISSN	14346060
Journal	The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics
Volume Number	55
Issue Number	1
e-ISSN	14346079
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-06-30
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nonlinear Dynamics Spectroscopy/Spectrometry Quantum Information Technology, Spintronics Quantum Physics Physical Chemistry Atomic, Molecular, Optical and Plasma Physics
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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