Melinger, JS; McMorrow, D; Hillegas, C; Warren, WS, *Selective excitation of vibrational overtones in an anharmonic ladder with frequency- and amplitude-modulated laser pulses*,
Physical Review A - Atomic, Molecular, and Optical Physics, vol. 51 no. 4
(1995),
pp. 3366-3369 [doi] .
**Abstract:**

*We show numerically that the complex hyperbolic secant pulse provides robust selective inversion of vibrational overtones. A density-matrix analysis is performed for a ten-level Morse-oscillator approximation of a diatomic molecule. We also show that in the limit of adiabatic excitation the complex-hyperbolic-secant pulse yields an inversion spectrum that is narrower than its spectral bandwidth. © 1995 The American Physical Society.*