Single-color two-photon spectroscopy of Rydberg states in electric fields
Abstract
Rydberg states of atomic helium with principal quantum numbers ranging from n =20 to n =100 have been prepared by non-resonance-enhanced single-color two-photon excitation from the metastable 2 3S1 state. Photoexcitation was carried out using linearly and circularly polarized pulsed laser radiation. In the case of excitation with circularly polarized radiation, Rydberg states with azimuthal quantum number | mℓ|=2 were prepared in zero electric field and in homogeneous electric fields oriented parallel to the propagation axis of the laser radiation. In sufficiently strong electric fields, individual Rydberg-Stark states were resolved spectroscopically, highlighting the suitability of non-resonance-enhanced multiphoton excitation schemes for the preparation of long-lived high-| mℓ| hydrogenic Rydberg states for deceleration and trapping experiments. Applications of similar schemes for Doppler-free excitation of positronium atoms to Rydberg states are also discussed.
- Publication:
-
Physical Review A
- Pub Date:
- November 2014
- DOI:
- 10.1103/PhysRevA.90.053430
- arXiv:
- arXiv:1412.3043
- Bibcode:
- 2014PhRvA..90e3430W
- Keywords:
-
- 32.80.Ee;
- 32.70.Jz;
- 32.80.Rm;
- 36.10.Dr;
- Rydberg states;
- Line shapes widths and shifts;
- Multiphoton ionization and excitation to highly excited states;
- Positronium muonium muonic atoms and molecules;
- Physics - Atomic Physics
- E-Print:
- Phys. Rev. A 90, 053430 (2014)