TY - JOUR

T1 - Consequences of optical pumping and interference for excitation spectra in a coherently driven molecular ladder system

AU - Bezuglov, N

AU - Garcia-Fernandez, R

AU - Ekers, A

AU - Miculis, K

AU - Yatsenko, L

AU - Bergmann, K

PY - 2008

Y1 - 2008

N2 - This paper presents observations and an interpretation of laser-induced excitation and fluorescence in a ladder g-e-f of three molecular levels [X 1Σg+(v″=0,J″=7), A 1Σu+(v′=10,J′=8), and 5 1Σg+(v=10,J=9), respectively] observed in a supersonic molecular beam of Na2. The g-e coupling, by cw laser P, is strong. A weak cw laser S couples levels e and f. The basic observations are of level-f fluorescence as a function of the detuning of the S laser from resonance. The signal profile does not appear as the typical Autler-Townes doublet, but as a spectral structure, whose position, width, and shape depend upon several laser parameters. We interpret these results using a simple model of three nondegenerate quantum states coherently excited while undergoing population loss to states outside the three-level system. We invoke the mechanism of optical pumping and evolution along adiabatic states, together with Landau-Zener transition probabilities. We also present results from numerical studies, which include all quant

AB - This paper presents observations and an interpretation of laser-induced excitation and fluorescence in a ladder g-e-f of three molecular levels [X 1Σg+(v″=0,J″=7), A 1Σu+(v′=10,J′=8), and 5 1Σg+(v=10,J=9), respectively] observed in a supersonic molecular beam of Na2. The g-e coupling, by cw laser P, is strong. A weak cw laser S couples levels e and f. The basic observations are of level-f fluorescence as a function of the detuning of the S laser from resonance. The signal profile does not appear as the typical Autler-Townes doublet, but as a spectral structure, whose position, width, and shape depend upon several laser parameters. We interpret these results using a simple model of three nondegenerate quantum states coherently excited while undergoing population loss to states outside the three-level system. We invoke the mechanism of optical pumping and evolution along adiabatic states, together with Landau-Zener transition probabilities. We also present results from numerical studies, which include all quant

U2 - DOI: 10.1103/PhysRevA.78.053804

DO - DOI: 10.1103/PhysRevA.78.053804

M3 - статья

VL - 78

SP - 053804_1-9

JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

SN - 1050-2947

IS - 5

ER -