Linear approximation excited state Hanle effect

1 Linear approximation excited state Hanle effect 

Let us consider the transition (J = 1 - J — 1) which is excited by linearly polarized light, the polarization vector E being directed at angles 6, (p Fig. 5.8. Substituting the values of the Dyakonov tensor from Table 2.1, and the coefficients from Table 5.2 into the system of equations 

The result obtained reflects linear approximation, i.e. manifestation of the usual linear (observable signal is proportional to Tp) Hanle effect (Section 4.2). This contention becomes obvious if we substitute the polarization moments obtained into the expression for fluorescence intensity (5.34) and find the form of the degree of polarization V = (Iy — Ix)/(Iy + Ix) (Fig. 5.8). For instance, for a radiative transition (J = 1) - (J = 1), and using Table C.3 for numerical values of 6j-symbols and for values of from Table 2.1, we obtain 

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