Download PDF by E. Arimondo, P.R. Berman and C.C. Lin (Eds.): Advances in Atomic, Molecular, and Optical Physics

By E. Arimondo, P.R. Berman and C.C. Lin (Eds.)

ISBN-10: 0123810213

ISBN-13: 9780123810212

This quantity maintains the culture of the Advances sequence. It comprises contributions from specialists within the box of atomic, molecular, and optical (AMO) physics. The articles comprise a few evaluation fabric, yet are meant to supply a accomplished photo of modern vital advancements in AMO physics. either theoretical and experimental articles are incorporated within the quantity. . foreign specialists . finished articles . New advancements

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In Section 4, we address a number of outstanding issues including light shifts, light sources for CPT, and unique experimental environments in which CPT is observed. Finally in Section 5, we offer some conclusions and discuss how the new ideas connected with CPT may ultimately impact the development of future atomic frequency references. 2 Basic Principles A two-level atom illuminated by a monochromatic electromagnetic field is perhaps the simplest spectroscopic system. When the frequency of the illumination field is tuned into resonance with the transition between the atomic levels, radiation is scattered by the atom via spontaneous emis­ sion, causing fluorescence, and a corresponding change in the intensity and phase of the transmitted radiation (see Figure 1a).

An improvement in the absorption contrast by a factor of $10 is obtained by use of the D1 resonance. The line width of the D1-excited resonance is also narrower. Reprinted figure with permission from Stahler et al. (2002); Ó 2002 of the Optical Society of America The influence of additional energy levels on CPT resonances becomes clearly evident when CPT resonances using D1 and D2 transitions are compared by use of the atomic vapor cell (Zhu, 2002). , 2002). A comparison of CPT resonances obtained using D1 and D2 excitation, but otherwise under similar conditions, is shown in Figure 12.

1976); Ó 1976 of the Societa Italiana de Fisica A similar phenomenon on the Zeeman rather than hyperfine coherences was reported earlier by Bell and Bloom (1961), and a review of CPT is given by Arimondo (1996). A key aspect of this phenomenon is that coherences in atoms at microwave frequencies can be excited even with no microwave fields being present at the location of the atoms. The hyperfine coherences are excited entirely by two-photon processes involving only optical fields and have a line width determined by the hyperfine relaxation rate.

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Advances in Atomic, Molecular, and Optical Physics by E. Arimondo, P.R. Berman and C.C. Lin (Eds.)

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