41 citations · 269 across the 15 of their papers we have counts for
17 papers
Phase-Sensitive Heterodyne Detection of MW using EIT Harmonics in Rydberg Atoms
Mangesh Bhattarai, Rishav Hui, Sumanta Khan +3
We investigate the generation and characterization of higher-order harmonics in the probe-laser absorption arising from nonlinear interactions in an electromagnetically induced tra…
Ultrafast Many-Body Dynamics in an Ultracold Rydberg-Excited Atomic Mott Insulator
V. Bharti, S. Sugawa, M. Mizoguchi +7
We report the observation and control of ultrafast non-equilibrium many-body electron dynamics in Rydberg-excited spatially-ordered ultracold atoms created from a three-dimensional…
Observation of electromagnetically induced absorption in a vee + ladder system
Mangesh Bhattarai, Vineet Bharti, Sambit Banerjee +1
We experimentally demonstrate electromagnetically induced absorption (EIA) in a vee + ladder system. The experiment is done using the low-lying energy levels of Rb. A theore…
Ultrafast creation of overlapping Rydberg electrons in an atomic BEC and Mott-insulator lattice
Michiteru Mizoguchi, Yichi Zhang, Masaya Kunimi +13
An array of ultracold atoms in an optical lattice (Mott insulator) excited to a state where single electron wave-functions spatially overlap would represent a new and ideal platfor…
Study of EIT resonances in an anti-relaxation coated Rb vapor cell
Mangesh Bhattarai, Vineet Bharti, Vasant Natarajan +2
We demonstrate---experimentally and theoretically---that resonances obtained in electromagnetically induced transparency (EIT) can be both bright and dark. The experiments are done…
Observation of CPT for the ground hyperfine interval in Cs
Sumanta Khan, Vineet Bharti, Vasant Natarajan
We use the technique of coherent population trapping (CPT) to access the ground hyperfine interval (clock transition) in Cs. The probe and control beams required for CPT ar…
Tuning of the Hanle effect from EIT to EIA using spatially separated probe and control beams
Mangesh Bhattarai, Vineet Bharti, Vasant Natarajan
We demonstrate a technique for continuous tuning of the Hanle effect from electromagnetically induced transparency (EIT) to electromagnetically induced absorption (EIA) by changing…
Coherent population pumping in a bright state
Sumanta Khan, Vineet Bharti, Vasant Natarajan
We demonstrate resonances due to coherent population pumping in a bright state (CBS), using magnetic sublevels of the closed transition in Rb…
Sub- and super-luminal light propagation using a Rydberg state
Vineet Bharti, Vasant Natarajan
We present a theoretical study to investigate sub- and super-luminal light propagation in a rubidium atomic system consisting of a Rydberg state by using density matrix formalism.…
Study of CPO resonances on the intercombination line in Yb
Pushpander Kumar, Alok K. Singh, Vineet Bharti +2
We study coherent population oscillations (CPO) in an odd isotope of the two-electron atom Yb. The experiments are done using magnetic sublevels of the $ F_g = 5/2 \rightarrow F_e…
Role of dressed-state interference in electromagnetically induced transparency
Sumanta Khan, Vineet Bharti, Vasant Natarajan
Electromagnetically induced transparency (EIT) in three-level systems uses a strong control laser on one transition to modify the absorption of a weak probe laser on a second trans…
Wavelength mismatch effect in electromagnetically induced absorption
Vineet Bharti, Ajay Wasan, Vasant Natarajan
We present a theoretical investigation of the phenomenon of electromagnetically induced absorption (EIA) in a 4-level system consisting of vee and ladder subsystems. The four level…
Optical properties of an inhomogeneously broadened multilevel V-system in the weak and strong probe regimes
Paramjit Kaur, Vineet Bharti, Ajay Wasan
We present a theoretical model, using density matrix approach, to study the effect of weak as well as strong probe field on the optical properties of an inhomogeneously broadened m…
Polarization dependent tuning of the Hanle effect in the ground state of Cs
Harish Ravi, Mangesh Bhattarai, Vineet Bharti +1
We demonstrate that the Hanle effect can be tuned between magnetically induced absorption (MIA) and magnetically induced transmission (MIT) simply by changing the polarization of t…
Study of a four-level system in vee + ladder configuration
Vineet Bharti, Vasant Natarajan
We present the results of a theoretical study of a four-level atomic system in vee + ladder configuration using a density matrix analysis. The absorption and dispersion profiles ar…
Coherent population trapping (CPT) versus electromagnetically induced transparency (EIT)
Sumanta Khan, Molahalli Panidhara Kumar, Vineet Bharti +1
We discuss the differences between two well-studied and related phenomena---coherent population trapping (CPT) and electromagnetically induced transparency (EIT). Many differences…
Polarization-rotation resonances with subnatural widths using a control laser
Sapam Ranjita Chanu, Kanhaiya Pandey, Vineet Bharti +2
We demonstrate extremely narrow resonances for polarization rotation in an atomic vapor. The resonances are created using a strong control laser on the same transition, which polar…