Illustration from Scientific Research

Simplified Jablonski diagram showing optical pumping of DAP:PTP using 620 nm light to the singlet excited state. The population of spins then transfer to the triplet sublevels (each labelled according to the molecular axes drawn on a DAP molecule) through intersystem crossing, where the frequency of the transition between Tx and Tzis shown and the sublevel population ratios are given.[3] The populations then decay back to the singlet ground state through depopulating rates labelled as ki, where i=x,y,z refers to different depopulating rates for each sublevel.

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