96 citations · 547 across the 20 of their papers we have counts for
21 papers
Linear and nonlinear optical torque in multi-level atomic systems driven by counter-rotating orbital angular momentum fields
Dharma P. Permana, Mažena Mackoit Sinkevičienė, Viačeslav Kudriašov +3
We investigate the generation of optical torque in coherently prepared multi-level atomic media driven by a vector vortex beam composed of two counter-rotating components carrying…
Propagation of optical vector vortices of slow light in a coherently prepared tripod configuration
Dharma P. Permana, Mažena Mackoit Sinkevičienė, Julius Ruseckas +1
We investigate the propagation of optical vector vortices of slow light in a coherently prepared four-level tripod atomic system. The vector vortex consists of superposed pulse pai…
Coherent phase control of orbital-angular-momentum light-induced torque in a double-tripod atom-light coupling scheme
Hamid R. Hamedi, Viačeslav Kudriašov, Mažena Mackoit-Sinkevičienė +1
We investigate a phase-controllable mechanism for generating optical torque in a five-level double-tripod (DT) atom-light coupling scheme interacting with four strong coherent cont…
Spin-orbit coupling of optical vector vortices in coherently prepared media
Dharma P. Permana, Mazena Mackoit Sinkevičienė, Julius Ruseckas +1
We investigate the propagation of an optical vector vortex weakly interacting with a coherently prepared atomic medium (phaseonium) in a three-level configuration. The vector b…
Mitigating the phase-mismatch effect in non-resonant four-wave mixing enabled by optimal control
Ning Jia, Hamid R. Hamedi, Jing Qian
Phase-mismatch in nonlinear optical processes can severely limit the propagation and conversion efficiency of light fields. Here, we present an efficient optimal-control strategy t…
Generating Grating in Cavity Magnomechanics
Wenzhang Liu, Muqaddar Abbas, Seyyed Hossein Asadpour +3
We investigate the phenomenon of magnomechanically induced grating (MMIG) within a cavity magnomechanical system, comprising magnons (spins in a ferromagnet, such as yttrium iron g…
Spatio-spectral control of spontaneous emission
Seyyed Hossein Asadpour, Muqaddar Abbas, Hamid R. Hamedi +3
We propose a scheme aimed at achieving spatio-spectral control over spontaneous emission within a four-level atom-light coupling system interacting with optical vortices carrying o…
Adiabatons in a double tripod coherent atom-light coupling scheme
Viačeslav Kudriašov, Hamid R. Hamedi, Julius Ruseckas
Optical adiabatons are specific shape-invariant pulse pairs propagating at the reduced group velocity and without optical absorption in the medium. The purpose of this study is to…
Spatial Characterization of Fraunhofer Diffraction in a Four-Level Light-Matter Coupling System
Seyyed Hossein Asadpour, Teodora Kirova, Hamid R. Hamedi +1
We explore the spatial features of various orders of Fraunhofer diffraction patterns in a four-level N-type atomic system. The system interacts with a weak probe light, a standing…
Ultimate conversion efficiency bound for the forward double- atom-light coupling scheme
Dionisis Stefanatos, Athanasios Smponias, Hamid Reza Hamedi +1
We show that for the two widely used configurations of the double- atom-light coupling scheme, one where the control fields are applied in the same -subsystem and another whe…
Spatially strongly confined atomic excitation via two dimensional stimulated Raman adiabatic passage
Hamid R. Hamedi, Giedrius Zlabys, Veronica Ahufinger +3
We consider a method of sub-wavelength superlocalization and patterning of atomic matter waves via a two dimensional stimulated Raman adiabatic passage (2D STIRAP) process. An atom…
Strongly confined atomic localization by Rydberg coherent population trapping
Teodora Kirova, Ning Jia, Seyyed Hossein Asadpour +3
In this letter we investigate the possibility to attain strongly confined atomic localization using interacting Rydberg atoms in a Coherent Population Trapping (CPT) ladder configu…
Ultraprecise Rydberg atomic localization using optical vortices
Ning Jia, Teodora Kirova, Gediminas Juzeliunas +2
We propose a robust localization of the highly-excited Rydberg atoms, interacting with doughnut-shaped optical vortices. Compared with the earlier standing-wave (SW)-based localiza…
Control of nonlinear optical phenomena and spatially structured optical effects in a four-level quantum system near a plasmonic nanostructure
Hamid Reza Hamedi, Vassilios Yannopapas, Emmanuel Paspalakis
We investigate the nonlinear optical response of a four-level double-V-type quantum system interacting with a pair of weak probe fields while located near a two-dimensional array o…
Manipulation and exchange of Light with Orbital Angular Momentum in Quantum Dot Molecules
Mahboubeh Mahdavi, Zahra Amini Sabegh, Mohammad Mohammadi +2
We study the interaction of laser pulses carrying orbital angular momentum (OAM) with structural asymmetry quantum dot molecules characterized by four energy levels. We demonstrate…
Off-axis optical vortices using double-Raman singlet and doublet light-matter schemes
Hamid Reza Hamedi, Julius Ruseckas, Emmanuel Paspalakis +1
We study the formation of off-axis optical vortices propagating inside a double-Raman gain atomic medium. The atoms interact with two weak probe fields as well as two strong pump b…
Complete energy conversion between light beams carrying orbital angular momentum using coherent population trapping for a coherently driven double-Λatom-light coupling
Hamid Reza Hamedi, Emmanuel Paspalakis, Giedrius Žlabys +2
We propose a procedure to achieve a complete energy conversion between laser pulses carrying orbital angular momentum (OAM) in a cloud of cold atoms characterized by a double-Λatom…
Transfer of optical vortices in coherently prepared media
Hamid Reza Hamedi, Julius Ruseckas, Emmanuel Paspalakis +1
We consider transfer of optical vortices between laser pulses carrying orbital angular momentum (OAM) in a cloud of cold atoms characterized by the configuration of the atom-li…
Exchange of optical vortices using an electromagnetically induced transparency based four-wave mixing setup
Hamid Reza Hamedi, Julius Ruseckas, Gediminas Juzeliūnas
We propose a scheme to exchange optical vortices of slow light using the phenomenon of electromagnetically induced transparency (EIT) in a four-level double- atom-light coupling…
Azimuthal modulation of electromagnetically induced transparency using structured light
Hamid Reza Hamedi, Viaceslav Kudriašov, Julius Ruseckas +1
Recently a scheme has been proposed for detection of the structured light by measuring the transmission of a vortex beam through a cloud of cold rubidium atoms with energy levels o…
Electromagnetically induced transparency and nonlinear pulse propagation in a combined tripod and atom-light coupling scheme
H. R. Hamedi, J. Ruseckas, G. Juzeliūnas
We consider propagation of a probe pulse in an atomic medium characterized by a combined tripod and Lambda () atom-light coupling scheme. The scheme involves three atomic ground…