ABSTRACT
A. N. Dharamsi and J. Tulip, "Contact Charge Transfer
Lasers", J. App. Phys.52, 4418,
1981
A mechanism for sustaining population inversions in contact
charge transfer complexes in which the ground electronic state is not bound is
described. The mechanism relies on picosecond radiationless depletion of the
lower laser state. This generates a population inversion even when the ground
electronic state, as plotted against donor-acceptor distance, is not repulsive
vertically below the excited state minimum. Contact charge-transfer lasers would
offer high-gain, high energy density, and tunable sources of coherent radiation
in the uv and visible. A method for
pumping such a laser is examined and applied to the pyrrole-oxygen complex. A
rate equation analysis is done and estimates for gain and energy density are
presented.
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