252 citations · 385 across the 11 of their papers we have counts for
11 papers
High-resolution resonance-enhanced multiphoton photoelectron circular dichroism
Alexander Kastner, Greta Koumarianou, Pavle Glodic +13
Photoelectron circular dichroism (PECD) is a highly sensitive enantiospecific spectroscopy for studying chiral molecules in the gas phase using either single-photon ionization or m…
Subpicosecond rotations of atomic clock states
Yunheung Song, Han-gyeol Lee, Hyosub Kim +2
We demonstrate subpicosecond-time-scale population transfer between the pair of hyperfine ground states of atomic rubidium using a single laser-pulse. Our scheme utilizes the geome…
Single-laser-pulse implementation of arbitrary ZYZ rotations of an atomic qubit
Han-gyeol Lee, Yunheung Song, Jaewook Ahn
Arbitrary rotation of a qubit can be performed with a three-pulse sequence; for example, ZYZ rotations. However, this requires precise control of the relative phase and timing betw…
Robust two-level system control by a detuned and chirped laser pulse
Hanlae Jo, Han-gyeol Lee, Stephane Guerin +1
We propose and demonstrate a robust control scheme by ultrafast nonadiabatic chirped laser pulse, designed for targeting coherent superpositions of two-level systems. Robustness ag…
Selective excitation in a three-state system using a hybrid adiabatic-nonadiabatic interaction
Yunheung Song, Han-gyeol Lee, Hanlae Jo +1
The chirped-pulse interaction in the adiabatic coupling regime induces cyclic permutations of the energy states of a three-level system in the -type configuration, which process…
In situ single-atom array synthesis by dynamic holographic optical tweezers
Hyosub Kim, Woojun Lee, Han-gyeol Lee +3
Cooling and trapping of atoms by light has enabled one to build and manipulate quantum systems at the single atom level. Such a bottom-up approach becomes one of the fascinating ch…
Quantum dynamics of a two-state system induced by a chirped zero-area pulse
Han-gyeol Lee, Yunheung Song, Hyosub Kim +2
It is well known that area pulses make Rabi oscillation and chirped pulses in the adiabatic interaction regime induce complete population inversion of a two-state system. Here we s…
Rabi oscillations of Morris-Shore transformed -state systems by elliptically polarized ultrafast laser pulses
Hyosub Kim, Yunheung Song, Han-gyeol Lee +1
We present an experimental investigation of ultrafast-laser driven Rabi oscillations of atomic rubidium. Since the broadband spectrum of an ultrafast laser pulse simultaneously cou…
Ultrafast Rabi oscillation of a Gaussian atom ensemble
Han-gyeol Lee, Hyosub Kim, Jaewook Ahn
We investigate Rabi oscillation of an atom ensemble in Gaussian spatial distribution. By using the ultrafast laser interaction with the cold atomic rubidium vapor spatially confine…
Optical repumping of triplet -states enhances magneto-optical trapping of ytterbium atoms
Jun Woo Cho, Han-gyeol Lee, Sangkyung Lee +5
Radiative decay from the excited state to metastable and states is expected to limit attainable trapped atomic population in a magneto-optic trap of ytterbi…
Coherent transients mimicked by two-photon coherent control of a three-level system
Jongseok Lim, Jae-uk Kim, Sangkyung Lee +1
We show that two-photon coherent control in a -shape three-level system projects one-photon coherent transient in a simple two-level system. Higher order chirps of a shaped lase…