89 citations · 193 across the 5 of their papers we have counts for
5 papers
Spin selection rule for {\it S} level transitions in atomic rubidium under paraxial and nonparaxial two-photon excitation
Krishnapriya Subramonian Rajasree, Ratnesh Kumar Gupta, Vandna Gokhroo +5
We report on an experimental test of the spin selection rule for two-photon transitions in atoms. In particular, we demonstrate that the transition rate in a…
Observation of the Rb to electric quadrupole transition at 516.6 nm mediated via an optical nanofibre
Tridib Ray, Ratnesh K. Gupta, Vandna Gokhroo +4
Light guided by an optical nanofibre can have a very steep evanescent field gradient extending from the fibre surface. This can be exploited to drive electric quadrupole transition…
A simple, narrow, and robust atomic frequency reference at 993 nm exploiting the rubidium (Rb) to transition using one-color two-photon excitation
Thomas Nieddu, Tridib Ray, Krishnapriya S. Rajasree +2
We experimentally demonstrate a one-color two-photon transition from the ground state to the excited state in rubidium (Rb) vapor using a co…
Enhancement of the quadrupole interaction of an atom with guided light of an ultrathin optical fiber
Fam Le Kien, Tridib Ray, Thomas Nieddu +2
We investigate the electric quadrupole interaction of an alkali-metal atom with guided light in the fundamental and higher-order modes of a vacuum-clad ultrathin optical fiber. We…
Optical nanofibres and neutral atoms
Thomas Nieddu, Vandna Gokhroo, Sile Nic Chormaic
Optical nanofibres are increasingly being used in cold atom experiments due to their versatility and the clear advantages they have when developing all-fibred systems for quantum t…