Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Applied Optics

Manipulating spatially distributed absorption effects in the atomic configuration of mercury with orbital angular momentum beams

Musallam Ahmed Salim Tabook, Farag M. A. Altalbawy, Benien C. Gabel, Helen Merina Albert, M. Manjula, Sandeep Kumar Singh, P. Vijay, Pushkar Jassal, Baydaa Abd, Ahmed Mohammed Ahmed

Published Sep 24, 2025• 0 citations
Publisher

Abstract

In this paper, we investigate the spatially dependent absorption characteristics of a four-level atomic mercury system interacting with optical vortex beams carrying orbital angular momentum (OAM). By measuring the imaginary part of the susceptibility of the probe field, we explore the effects of various configurations of control fields on the absorption profile. Initially, we examine the case with a single-composite OAM beam, observing that regions of reduced absorption form flower-like petal patterns, which become more pronounced with increasing OAM values. Introducing a second composite beam with matching or differing OAM values significantly modifies these patterns, leading to enhanced control over the spatial distribution of absorption and transparency. Additionally, we consider the impact of an incoherent pumping field on the transition. Our findings show that the incoherent pumping field further refines the absorption patterns, enabling precise control over the spatial zones of high and low transmission. This effect is particularly pronounced in non-resonant conditions, where the spatial distribution of transparency and absorption can be finely tuned by modifying the OAM characteristics of the composite beams. These results demonstrate the potential of using OAM composite beams and incoherent pumping fields to manipulate light-matter interactions at the quantum level, with applications in high-resolution imaging, quantum information storage, and the creation of complex optical traps for atomic systems.

DOI
10.1364/ao.568784

Related papers

Azimuthally dependent absorption and gain in an atomic system with spontaneously generated coherence controlled by an optical vortex field

Viačeslav Kudriašov, Teodora Kirova, Seyyed Hossein Asadpour +1 more

This paper examines spatially dependent absorption and gain of a weak probe field in a 3-level atomic Λ-system with spontaneously generated coherence and incoherent pump, using an optical vortex beam as the control field. The inhomogeneous phase distribution between the probe and vortex fields modulates the transverse distribution of the system's optical response. A flexible control over the azimuthal modulation in the transverse plane can be achieved by changing such parameters as the orbital angular momentum and the optical transition detuning. The vortex parameters can also be used to affect the population distribution of the atomic system's upper state. This method for achieving precise control over the optical response characteristics contributes to advances in optical information and communication, quantum devices and sensing.

Scientific Reports•Apr 15, 2025•7 citations

Controlling of the spatially dependent absorption spectrum by quantum interference

Yufan Zhang, Deyi Kong, Fei Wang

In this paper, the spatially dependent probe absorption is investigated in a five-level cascade atomic system. We consider that four control fields interact with the atomic transitions forming a closed-loop structure, and a weak probe field is applied between the ground states and the lowest excited state. It is shown that the narrowing of the probe absorption profile is controllable by the intensities of the four driving fields. More interestingly, we find that the radial modification of electromagnetically induced transparency (EIT) is possible to obtain by simply increasing the numbers of the orbital angular momentum (OAM) of the vortex fields. In addition, the Doppler broadening effect on the spatially dependent EIT is also discussed briefly, demonstrating that various spatial absorption distributions are obtainable in different cases. The internal mechanisms can be attributed to the triple quantum interference effect according to the dressed-state analysis. It is possible to find potential applications in quantum information storage and high-dimensional quantum communications.

Applied Optics•Sep 6, 2024•2 citations

Orbital angular momentum-dependent transmission in a hybrid optomechanical cavity with composite vortex light

Qiang Li, Zhao Yang

Abstract The theoretical investigation into spatially coherent control over electromagnetically induced transparency is carried out within a hybrid cavity system comprising a three-level atomic configuration, a mechanical resonator, and an optical cavity. The interaction involves driving a composite vortex light (CVL) with a three-level medium. Our findings reveal that the input-output cavity field can be systematically adjusted, resulting in changes to the transmission spectrum of the weak probe light. The transmission spectrum of the output light can be spatially controlled by manipulating the orbital angular momentum of the CVL and through parametric modulation of the system. Our simulations present a flexible approach for managing light-matter interactions in a hybrid optomechanical system.

Laser Physics Letters•Feb 1, 2026•2 citations

Manipulation of Coherent Optical Phenomena and the Generation of Orbital Angular Momentum-Based Four-Wave Mixing Signal Using Structured Light

Samim Akhtar, Jayanta K. Saha, Md. Mabud Hossain

Abstract We study various coherent optical properties, e.g., two-photon electromagnetically induced transparency (EIT) and three-photon electromagnetically induced transparency and absorption (TPEIT/TPEIA), in a four-level ladder (Ξ)-type system of 87Rb atoms, where the probe and control fields are Gaussian-shaped laser beams and the pump field is structured laser beam. Additionally, the generated four-wave mixing (FWM) signal has been studied. Interestingly, it is found that the generated FWM signal is spatially structured along with the azimuthal phase, which carries the orbital angular momentum (OAM) of light. It is also observed that the coherent optical responses (EIT, TPEIT/TPEIA, and FWM signals) can be manipulated by utilizing the OAM number of the pump beam as a control knob.

Physics of Wave Phenomena•Aug 1, 2025•0 citations

Azimuthally controlled nonlinear optical response in germanium-vacancy color centers

Ibrahim Salam Nafea, P. Rodrigues, H. Khalifa Alhitmi +8 more

We investigate theoretically the spatially dependent linear and nonlinear optical properties of a four-level germanium-vacancy center system in diamond, driven by coherent laser fields under electromagnetically induced transparency conditions. In our model, one of the strong coupling fields carries orbital angular momentum (OAM) and is treated as a composite vortex beam. By numerically solving the steady-state equations of the motion, we demonstrate that both linear and third-order nonlinear optical susceptibilities are highly sensitive to the OAM value of the coupling field. Our results reveal that increasing the OAM induces spectral splitting, enhances Kerr nonlinearity, and enables the emergence of structured absorption and dispersion profiles with characteristic 2l-fold azimuthal symmetry. Notably, we identify the formation of nonlinear islands—localized spatial regions where strong Kerr nonlinearity coincides with minimal absorption. These islands are tunable via the OAM number and detuning parameters, providing a powerful mechanism for spatial control of light–matter interactions. This work offers new insights into OAM-mediated coherence effects in solid-state quantum systems and points toward promising applications in nonlinear photonics, optical information processing, and spatially structured quantum devices.

Journal of the Optical Society of America B•Oct 14, 2025•0 citations

Orbital angular momentum controlled reflection and phase shifts in a three-level atom-assisted single-sided cavity

Pengju Kuang, Ning Fu, Lei Ni +2 more

Abstract Spatially structured optical reflection and phase modulation in cavity quantum electrodynamics present a pathway to programmable control of structured light and topological photonic states. This study examines the spatial response of a three-level atom–assisted single-sided cavity, driven by a composite vortex control field, by analyzing the transverse distributions of the reflection coefficient and reflected-phase shift as influenced by variations in cavity decay rate, external coupling strength, and the orbital angular momentum (OAM) content of the driving fields. The control Rabi frequency Ω l ( r , ϕ ) , which inherits the doughnut-shaped amplitude and helical phase of vortex beams, results in position-dependent atomic coherence and effective cavity susceptibility, imprinting ring-like or petal-like textures onto both reflectivity and phase. For symmetric counter-rotating vortices with l 1 = − l 2 = 1 − 4 , the reflection forms 2 l -petal patterns, and the phase exhibits complementary 2 l -fold lobes with sharp phase-gradient boundaries dictated by cos ⁡ ( 2 l ϕ ) interference, while central singular features intensify with OAM order. In the case of asymmetric OAM pairs, rotational symmetry is disrupted, and the spatial spectra are primarily determined by Δ l = 3 and 5, respectively, resulting in distorted threefold and fivefold modulations with localized singular defects and star-like phase topology.

Laser Physics Letters•Aug 1, 2026•0 citations
In this paper, we investigate the spatially dependent absorption characteristics of a four-level atomic mercury system interacting with optical vortex beams carrying orbital angular momentum (OAM). By measuring the imaginary part of the susceptibility of the probe field, we explore the effects of various configurations of control fields on the absorption profile. Initially, we examine the case with a single-composite OAM beam, observing that regions of reduced absorption form flower-like petal patterns, which become more pronounced with increasing OAM values. Introducing a second composite beam with matching or differing OAM values significantly modifies these patterns, leading to enhanced control over the spatial distribution of absorption and transparency. Additionally, we consider the impact of an incoherent pumping field on the transition. Our findings show that the incoherent pumping field further refines the absorption patterns, enabling precise control over the spatial zones of high and low transmission. This effect is particularly pronounced in non-resonant conditions, where the spatial distribution of transparency and absorption can be finely tuned by modifying the OAM characteristics of the composite beams. These results demonstrate the potential of using OAM composite beams and incoherent pumping fields to manipulate light-matter interactions at the quantum level, with applications in high-resolution imaging, quantum information storage, and the creation of complex optical traps for atomic systems.
This paper examines spatially dependent absorption and gain of a weak probe field in a 3-level atomic Λ-system with spontaneously generated coherence and incoherent pump, using an optical vortex beam as the control field. The inhomogeneous phase distribution between the probe and vortex fields modulates the transverse distribution of the system's optical response. A flexible control over the azimuthal modulation in the transverse plane can be achieved by changing such parameters as the orbital angular momentum and the optical transition detuning. The vortex parameters can also be used to affect the population distribution of the atomic system's upper state. This method for achieving precise control over the optical response characteristics contributes to advances in optical information and communication, quantum devices and sensing.
In this paper, the spatially dependent probe absorption is investigated in a five-level cascade atomic system. We consider that four control fields interact with the atomic transitions forming a closed-loop structure, and a weak probe field is applied between the ground states and the lowest excited state. It is shown that the narrowing of the probe absorption profile is controllable by the intensities of the four driving fields. More interestingly, we find that the radial modification of electromagnetically induced transparency (EIT) is possible to obtain by simply increasing the numbers of the orbital angular momentum (OAM) of the vortex fields. In addition, the Doppler broadening effect on the spatially dependent EIT is also discussed briefly, demonstrating that various spatial absorption distributions are obtainable in different cases. The internal mechanisms can be attributed to the triple quantum interference effect according to the dressed-state analysis. It is possible to find potential applications in quantum information storage and high-dimensional quantum communications.
Abstract The theoretical investigation into spatially coherent control over electromagnetically induced transparency is carried out within a hybrid cavity system comprising a three-level atomic configuration, a mechanical resonator, and an optical cavity. The interaction involves driving a composite vortex light (CVL) with a three-level medium. Our findings reveal that the input-output cavity field can be systematically adjusted, resulting in changes to the transmission spectrum of the weak probe light. The transmission spectrum of the output light can be spatially controlled by manipulating the orbital angular momentum of the CVL and through parametric modulation of the system. Our simulations present a flexible approach for managing light-matter interactions in a hybrid optomechanical system.
Abstract We study various coherent optical properties, e.g., two-photon electromagnetically induced transparency (EIT) and three-photon electromagnetically induced transparency and absorption (TPEIT/TPEIA), in a four-level ladder (Ξ)-type system of 87Rb atoms, where the probe and control fields are Gaussian-shaped laser beams and the pump field is structured laser beam. Additionally, the generated four-wave mixing (FWM) signal has been studied. Interestingly, it is found that the generated FWM signal is spatially structured along with the azimuthal phase, which carries the orbital angular momentum (OAM) of light. It is also observed that the coherent optical responses (EIT, TPEIT/TPEIA, and FWM signals) can be manipulated by utilizing the OAM number of the pump beam as a control knob.
We investigate theoretically the spatially dependent linear and nonlinear optical properties of a four-level germanium-vacancy center system in diamond, driven by coherent laser fields under electromagnetically induced transparency conditions. In our model, one of the strong coupling fields carries orbital angular momentum (OAM) and is treated as a composite vortex beam. By numerically solving the steady-state equations of the motion, we demonstrate that both linear and third-order nonlinear optical susceptibilities are highly sensitive to the OAM value of the coupling field. Our results reveal that increasing the OAM induces spectral splitting, enhances Kerr nonlinearity, and enables the emergence of structured absorption and dispersion profiles with characteristic 2l-fold azimuthal symmetry. Notably, we identify the formation of nonlinear islands—localized spatial regions where strong Kerr nonlinearity coincides with minimal absorption. These islands are tunable via the OAM number and detuning parameters, providing a powerful mechanism for spatial control of light–matter interactions. This work offers new insights into OAM-mediated coherence effects in solid-state quantum systems and points toward promising applications in nonlinear photonics, optical information processing, and spatially structured quantum devices.
Abstract Spatially structured optical reflection and phase modulation in cavity quantum electrodynamics present a pathway to programmable control of structured light and topological photonic states. This study examines the spatial response of a three-level atom–assisted single-sided cavity, driven by a composite vortex control field, by analyzing the transverse distributions of the reflection coefficient and reflected-phase shift as influenced by variations in cavity decay rate, external coupling strength, and the orbital angular momentum (OAM) content of the driving fields. The control Rabi frequency Ω l ( r , ϕ ) , which inherits the doughnut-shaped amplitude and helical phase of vortex beams, results in position-dependent atomic coherence and effective cavity susceptibility, imprinting ring-like or petal-like textures onto both reflectivity and phase. For symmetric counter-rotating vortices with l 1 = − l 2 = 1 − 4 , the reflection forms 2 l -petal patterns, and the phase exhibits complementary 2 l -fold lobes with sharp phase-gradient boundaries dictated by cos ⁡ ( 2 l ϕ ) interference, while central singular features intensify with OAM order. In the case of asymmetric OAM pairs, rotational symmetry is disrupted, and the spatial spectra are primarily determined by Δ l = 3 and 5, respectively, resulting in distorted threefold and fivefold modulations with localized singular defects and star-like phase topology.