Optical nutation is the phenomenon of overlapping oscillations of the inversion of the atomic dipole moment on high-frequency oscillations with an external field frequency (modulation of the atomic dipole moment induced by an external field by inversion vibrations) for atoms with two energy levels in a stationary external electric field.
The polarization of the medium (the sum of the dipole moments) also oscillates at the field frequency, moreover, it has two components, one of them oscillates in phase with the field, the other is out of phase with respect to the field oscillations . When there is no frequency cut-off and , the phase component disappears. The polarization induced by the light wave has the opposite effect on the wave, the substance begins to emit secondary waves. As a result, slow (with Rabi frequency) changes in the intensity of the resulting field of secondary light waves will occur [1] .
, the phase component disappears. The polarization induced by the light wave has the opposite effect on the wave, the substance begins to emit secondary waves. As a result, slow (with Rabi frequency) changes in the intensity of the resulting field of secondary light waves will occur The phenomenon of optical nutation was theoretically predicted by K. Tang and G. Statz in 1968 [2] and was observed experimentally by G. Hawker and K. Tang in 1969 [3] .
See also
- Photon echo
- Self-induced transparency
- Optical resonance
- Rabi Frequency
Notes
- ↑ P.V. Korolenko. Interaction of radiation with matter and nonlinear optics. - Moscow: Publishing House of Moscow University, 1992. - S. 18-20. - 78 p.
- ↑ Tang, CL, Statz H. Appl. Phys. Lett. , 10, 145, 1968
- ↑ Hocker, GB, Tang, CL Phys. Rev. Lett. , 21, 591, 1969
Literature
- Allen, L., Eberly, J. Optical resonance and two-level atoms. - M.: Mir, 1978.- S. 222.