3 research outputs found
A simple, narrow, and robust atomic frequency reference at 993 nm exploiting the rubidium (Rb) to transition using one-color two-photon excitation
We experimentally demonstrate a one-color two-photon transition from the
ground state to the excited state in
rubidium (Rb) vapor using a continuous wave laser at 993 nm. The Rb vapor
contains both isotopes (Rb and Rb) in their natural abundances.
The electric dipole allowed transitions are characterized by varying the power
and polarization of the excitation laser. Since the optical setup is relatively
simple, and the energies of the allowed levels are impervious to stray magnetic
fields, this is an attractive choice for a frequency reference at 993 nm, with
possible applications in precision measurements and quantum information
processing.Comment: 8 pages, 4 figures, research articl
Observation of the 87Rb 5S1/2 to 4D3/2 electric quadrupole transition at 516.6 nm mediated via an optical nanofibre
Light guided by an optical nanofibre has a very steep evanescent field gradient extending from the fibre surface. This gradient can be exploited to drive electric quadrupole transitions in nearby quantum emitters. In this paper, we report on the observation of the 5S 1/2 →4D 3/2 electric quadrupole transition at 516.6 nm (in vacuum) in laser-cooled 87Rb atoms using only a few μW of laser power propagating through an optical nanofibre embedded in the atom cloud. This work extends the rangeof applications for optical nanofibres in atomic physics to include more fundamental tests such as high-precision measurements of parity non-conservation