Abstract
In this paper we present a theoretical framework to identify the role of coherent population oscillation (CPO) in saturated fluorescence spectroscopy in a two-level system which is a very useful spectroscopic technique for weak transitions. The fluorescence dip in a fluorescence spectra is generally explained as a saturation effect. However in this work, we find that the Doppler-free dip in a fluorescence spectra is due to saturation effect and CPO effect. The fluorescence dip is further modified by Doppler averaging and its linewidth and dip height are dependent on the temperature of the atomic gas and the applied laser beam intensity. For an atomic beam, the shift of the fluorescence dip from the line center is dependent on the average velocity of the atomic beam and the misalignment of the laser beams with respect to the atomic beam.
Graphical abstract
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
W. Demtroder, Laser Spectroscopy (Springer, 1998).
V. Natarajan, Modern Atomic Physics (CRC Press, 2015).
D. Das, V. Natarajan, J. Phys. B: At. Mol. Opt. Phys. 39, 2013 (2006).
J.J. McFerran, J. Opt. Soc. Am. B 33, 1278 (2016).
A. Banerjee, V. Natarajan, Opt. Lett. 28, 1912 (2003).
D. Das, V. Natarajan, Eur. Phys. J. D 37, 313 (2006).
A. Marsman, E.A. Hessels, M. Horbatsch, Phys. Rev. A 89, 043403 (2014).
I. Courtillot, A. Quessada-Vial, A. Brusch, D. Kolker, G.D. Rovera, P. Lemonde, Eur. Phys. J. D 33, 161 (2005).
C.Y. She, J.R. Yu, Appl. Opt. 34, 1063 (1995).
T. Yang, K. Pandey, M.S. Pramod, F. Leroux, C.C. Kwong, E. Hajiyev, Z.Y. Chia, B. Fang, D. Wilkowski, Eur. Phys. J. D 69, 226 (2015).
M.S. Feld, M.M. Burns, T.U. Kühl, P.G. Pappas, D.E. Murnick, Opt. Lett. 5, 79 (1980).
D.A. Smith, I.G. Hughes, Am. J. Phys. 72, 631 (2004).
H.R. Noh, Eur. J. Phys. 30, 1181 (2009).
G. Ferrari, P. Cancio, R. Drullinger, G. Giusfredi, N. Poli, M. Prevedelli, C. Toninelli, G. Tino, Phys. Rev. Lett. 91, 243002 (2003).
K. Pandey, A.K. Singh, P.V.K. Kumar, M.V. Suryanarayana, V. Natarajan, Phys. Rev. A 80, 022518 (2009).
L. Hui, G. Feng, Y.B. Wang, X. Tian, J. Ren, B.Q. Lu, Q.F. Xu, Y.L. Xie, H. Chang, Chin. Phys. B 24, 013201 (2015).
P.E. Atkinson, J.S. Schelfhout, J.J. McFerran, Phys. Rev. A 100, 042505 (2019).
M. Mrozek, A.M. Wojciechowski, D.S. Rudnicki, J. Zachorowski, P. Kehayias, D. Budker, W. Gawlik, Phys. Rev. B 94, 035204 (2016).
P. Kumar, A.K. Singh, V. Bharti, V. Natarajan, K. Pandey, J. Phys. B: At. Mol. Opt. Phys. 51, 035502 (2018).
T. Lauprêtre, S. Kumar, P. Berger, R. Faoro, R. Ghosh, F. Bretenaker, F. Goldfarb, Phys. Rev. A 85, 051805 (2012).
P. Neveu, M.A. Maynard, R. Bouchez, J. Lugani, R. Ghosh, F. Bretenaker, F. Goldfarb, E. Brion, Phys. Rev. Lett. 118, 073605 (2017).
E. Baldit, K. Bencheikh, P. Monnier, J.A. Levenson, V. Rouget, Phys. Rev. Lett. 95, 143601 (2005).
R.W. Boyd, J. Mod. Opt. 56, 1908 (2009).
G. Piredda, R. Boyd, J. Eur. Opt. Soc. – Rapid Publ. 2, 07004 (2007).
V.S. Zapasski, G.G. Kozlov, Opt. Spectrosc. 100, 419 (2006).
M.S. Bigelow, N.N. Lepeshkin, R.W. Boyd, Phys. Rev. Lett. 90, 113903 (2003).
K. Beloy, J.A. Sherman, N.D. Lemke, N. Hinkley, C.W. Oates, A.D. Ludlow, Phys. Rev. A 86, 051404 (2012).
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher’s Note
The EPJ Publishers remain neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Nyakang’o, E.O., Pandey, K. Role of velocity induced coherent population oscillation in saturated fluorescence spectroscopy. Eur. Phys. J. D 74, 96 (2020). https://doi.org/10.1140/epjd/e2020-100519-0
Received:
Revised:
Published:
DOI: https://doi.org/10.1140/epjd/e2020-100519-0