6533b860fe1ef96bd12c2eca

RESEARCH PRODUCT

Two-photon spectroscopy of mercury and velocity-selective double resonances

Daniel KolbeJochen WalzMartin ScheidFrank MarkertThomas Beyer

subject

PhysicsWavelengthNuclear magnetic resonanceTwo-photon excitation microscopyOff resonanceResonanceAtomic physicsSpectroscopyLambdaAtomic and Molecular Physics and OpticsLaser beams

description

Two-photon laser spectroscopy of the $6\text{ }{^{1}S}_{0}\ensuremath{-}7\text{ }{^{1}S}_{0}$ transition in mercury has been performed using two copropagating continuous-wave laser beams. One laser beam is at 254 nm wavelength and can be tuned to the $6\text{ }{^{1}S}_{0}\ensuremath{-}6\text{ }{^{3}P}_{1}$ resonance. The other laser beam is at 408 nm. Two very different regimes can be distinguished, one far off resonance and one near resonance with the one-photon resonance. A resonance which is not Doppler broadened has been observed for low Rabi frequencies. This velocity-selective double resonance in a three-level ladder system is analogous to the dark resonance in three-level $\ensuremath{\Lambda}$ systems.

https://doi.org/10.1103/physreva.80.053414