Experimental Demonstration of a Terahertz Frequency Reference based on Coherent Population Trapping
arXiv:1903.05386 · doi:10.1103/PhysRevApplied.12.034035
Abstract
A novel protocol of interrogation based on coherent population trapping in an N-level scheme atomic system leads to dark resonances involving three different photons. An ensemble of several hundreds of radiofrequency-trapped ions is probed by three lasers simultaneously locked onto the same optical frequency comb, resulting in high-contrast spectral lines referenced to an atomic transition in the THz domain. We discuss the cause of uncertainties and limitations for this method and show that reaching a sub-kHz resolution is experimentally accessible via this interrogation protocole.
References in corpus (22)
- Optical clocks based on ultra-narrow three-photon resonances in alkaline earth atoms
- High-performance coherent population trapping clock with polarization modulation
- Precision isotope shift measurements in Ca using highly sensitive detection schemes
- A high-performance Raman-Ramsey Cs vapor cell atomic clock
- Doppler- and recoil-free laser excitation of Rydberg states via three-photon transitions
- Controlling systematic frequency uncertainties at the level in linear Coulomb crystals
- Rotational spectroscopy of cold, trapped molecular ions in the Lamb-Dicke regime
- Prospects for atomic clocks based on large ion crystals
- Precision Measurement Method for Branching Fractions of Excited P1/2 States Applied to 40Ca+
- Ultra-high Resolution Spectroscopy with atomic or molecular Dark Resonances: Exact steady-state lineshapes and asymptotic profiles in the adiabatic pulsed regime
- Direct frequency-comb-driven Raman transitions in the terahertz range
- Quantum coherence and population trapping in three-photon processes
- Generalized Hyper-Ramsey Resonance with separated oscillating fields
- Metastable level lifetimes from electron-shelving measurements with ion clouds and single ions
- High-bandwidth transfer of phase stability through a fiber frequency comb
- AC Stark Shifts of Dark Resonances Probed with Ramsey Spectroscopy
- Terahertz frequency standard based on three-photon coherent population trapping
- Suppression of clock shifts at field-insensitive transitions
- A 3-photon process for producing a degenerate gas of metastable alkaline-earth atoms
- Fast and efficient transport of large ion clouds
- Phase transfer between three visible lasers for coherent population trapping
- A double ion trap for large Coulomb crystals