Electromagnetically Induced Transparency
Electromagnetically induced transparency (EIT) is a technique for making an otherwise optically-thick medium transparent to laser radiation.’ The basic idea is to use two lasers or electromagnetic fields whose frequency difference is equal to a Raman (or two-photon) transition of the atom or molecule. We term these fields as the coupling field and the probe field. Figure 1 shows some of the possibilities. Transparency may be created in a (a) three-state system, or (b) in the continuum. Instead, (c) a medium which is already transparent, but is refractively thick (ßL » 1), may be made refractively thin (ßL « 1).
KeywordsGroup Delay Probe Pulse Rabi Frequency Electromagnetically Induce Transparency Coupling Field
- 16.S. E. Harris and Zhen-Fei Luo, Phys. Rev. A (to be published).Google Scholar