Article
Mathematics
Xinchao Ruan, Hang Zhang, Wenqi Peng, Hui Xian, Yiwu Zhu, Wei Zhao, Sha Xiong
Summary: This study proposes a scheme for achieving high-capacity quantum communication in atmospheric environments, using orbital angular momentum multiplexed continuous variable entangled states for free-space quantum teleportation. The entangled states are prepared through spontaneous four-wave mixing, and the mode selection for Bell-state measurement is achieved using balanced homodyne detection. The study demonstrates the advantage of enhancing system channel capacity through OAM multiplexing.
Article
Physics, Multidisciplinary
Xinchao Ruan, Wenhao Shi, Guojun Chen, Wei Zhao, Hang Zhang, Ying Guo
Summary: The secret key rate is a major obstacle in the practical application of continuous-variable quantum key distribution systems. This paper proposes a multiplexing scheme to increase the secret key rate of a CVQKD system with orbital angular momentum (OAM), analyzing the propagation characteristics of a typical vortex beam and using discrete modulation to extend transmission distance. Numerical simulations show that the OAM multiplexing scheme can improve the performance of CVQKD systems, with potential for practical high-rate quantum communications.
Article
Optics
Yuanhang Zhang, Shenglin Wen, Shengfei Wang, Jian Zhang, Caixue Tang, Haoyi Zuo, Fuhua Gao, Fei Fan, Qinghua Zhang, Qiao Xu
Summary: This study introduces a fully continuous spiral phase plate (FC-SPP) that enables the generation of ultraintense Laguerre-Gaussian beams. A large-aperture FC-SPP has been fabricated on a fused silica substrate through magnetorheological finishing, and its high quality and feasibility for producing high-intensity vortices have been confirmed.
News Item
Optics
Philippe St-Jean
Summary: This paper presents a novel solid-state laser that can generate a large array of phase-locked optical vortices with tunable orbital angular momentum.
Article
Optics
Kunjian Dai, J. Keith Miller, Justin Free, Martyn Lemon, Fraser Dalgleish, Eric G. Johnson
Summary: This study demonstrates the generation of a spatially asymmetric perfect vortex (APV) basis using a pulsed 2D HOBBIT system, which holds potential for remote sensing applications. The results showcase the application of the APV basis in amplitude object pattern recognition and phase object wavefront sensing.
Article
Physics, Multidisciplinary
Aleksi Leinonen, Antti Hannonen, Henri Partanen, Janne Heikkinen, Tero Setala, Ari T. Friberg, Tommi K. Hakala
Summary: This article introduces the geometric phase of classical electromagnetic light beams, which is applicable to fields undergoing cyclic, discrete polarizations changes. Berry later recognized a similar phase for adiabatic quantum systems, extending it to nonadiabatic and noncyclic quantum state evolutions. However, no optical counterpart for the noncyclic, adiabatic evolution has been demonstrated. In this study, a modified Young's two-pinhole setup is used to generate arbitrary continuous spatial evolution of polarization state, demonstrating the adiabatic noncyclic evolution of the Pancharatnam-Berry phase in an optical context.
COMMUNICATIONS PHYSICS
(2023)
Article
Multidisciplinary Sciences
Mairihaba Ababaike, Shutong Wang, Palidan Aierken, Takashige Omatsu, Taximaiti Yusufu
Summary: This study explored high energy, near and mid-infrared optical vortex lasers generated by a 1 µm optical vortex-pumped KTiOAsO4 (KTA) optical parametric oscillator. The orbital angular momentum of the pump beam was selectively transferred to the signal or idler output by adjusting the output coupler reflectivity, resulting in 1.535 µm and 3.468 µm vortex laser outputs.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Lu Chen, Wenqi Zhu, Pengcheng Huo, Junyeob Song, Henri J. Lezec, Ting Xu, Amit Agrawal
Summary: Researchers have proposed a flexible approach to synthesize ultrafast optical transients with arbitrary control over its complete spatiotemporal evolution by leveraging the multifunctional control of light at the nanoscale. This method supports an ultrawide bandwidth with high spectral and spatial resolution, enabling the synthesis of complex states of structured space-time wave packets.
News Item
Optics
Spencer W. Jolly
Summary: A diffractive axicon can create intricate connections between topological charges and frequencies of ultrashort laser pulses, resulting in a diverse range of coiled light structures.
Editorial Material
Optics
Andrey Pryamikov
Summary: Standard vortex beams are limited in their capacity for communication due to rapid beam divergence at high OAM values, but this problem can be solved using multi-vortex geometric beams.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Physics, Multidisciplinary
Yangyang Fu, Yuan Tian, Xiao Li, Shili Yang, Youwen Liu, Yadong Xu, Minghui Lu
Summary: In this study, a new method for achieving robust asymmetric generation of acoustic vortex field through dual-layer metasurfaces is introduced. This is achieved by controlling the intrinsic topologic charges and the parity of geometry design. The underlying physics is contributed to the one-way process of orbital angular momentum transition ensured by the broken spatial symmetry and the external topologic charge from the vortex diffraction. The novel phenomenon is experimentally demonstrated, providing new routes to manipulate the asymmetric response of vortex fields and potential applications in passive OAM-based diodes.
PHYSICAL REVIEW LETTERS
(2022)
Editorial Material
Optics
Gianluca Ruffato
Summary: A recent publication suggests a solution to overcome the limitations of optical techniques and high-intensity beams by probing highly-intense vortex pulses with a structured reference beam.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Optics
Baghdasar Baghdasaryan, Carlos Sevilla-Gutierrez, Fabian Steinlechner, Stephan Fritzsche
Summary: This study derives a general expression for the spatio-temporal biphoton state in common experimental settings, which correctly describes the nonseparability of spatial and spectral modes. By considering the Gouy phase of interacting beams, a criterion on how to decrease the coupling between spatial and spectral degrees of freedom is formulated. This work provides new insights into the role of the Gouy phase in SPDC and the preparation of engineered entangled states for multidimensional quantum information processing.
Article
Multidisciplinary Sciences
Ali Ali, Mohsen Khalily, Tim Brown, Rahim Tafazolli
Summary: This article investigates the unexplored potentials of vortices or orbital angular momentum (OAM) beams using the low-cost and high-gain dielectric reflectarray antennas (RAs) at the terahertz band. It proposes a paradigm to enable 3D beam-steering or OAM multiplexing by a single structure via tilted OAM beams. The proposed paradigm can be utilized to produce RAs with beam-steering or OAM multiplexing capabilities as candidates for THz indoor communications.
Article
Optics
Hibiki Kagami, Tomohiro Amemiya, Sho Okada, Yahui Wang, Nobuhiko Nishiyama, Xiao Hu
Summary: This paper proposes a method for selectively propagating optical vortex modes with specific charge numbers in a photonic integrated circuit (PIC) using a topological photonic system. By performing appropriate band tuning, a specific electromagnetic mode can be excited in the topological waveguide, allowing for the propagation of optical vortex modes over a wide range in the C band.
Article
Physics, Multidisciplinary
A. G. de Oliveira, M. F. Z. Arruda, W. C. Soares, S. P. Walborn, A. Z. Khoury, A. Kanaan, P. H. Souto Ribeiro, R. Medeiros de Araujo
BRAZILIAN JOURNAL OF PHYSICS
(2019)
Article
Multidisciplinary Sciences
A. A. Matoso, R. A. Ribeiro, L. E. Oxman, A. Z. Khoury, S. Padua
SCIENTIFIC REPORTS
(2019)
Article
Physics, Multidisciplinary
B. Pinheiro da Silva, V. A. Pinillos, D. S. Tasca, L. E. Oxman, A. Z. Khoury
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Applied
B. Melo, I Brandao, B. Pinheiro da Silva, R. B. Rodrigues, A. Z. Khoury, T. Guerreiro
PHYSICAL REVIEW APPLIED
(2020)
Article
Nanoscience & Nanotechnology
Braian Pinheiro da Silva, Wagner T. Buono, Leonardo J. Pereira, Daniel S. Tasca, Kaled Dechoum, Antonio Z. Khoury
Summary: In this study, the transfer of angular momentum between spin and orbital degrees of freedom in structured light beams during frequency upconversion is demonstrated. The experimental results align well with the theoretical predictions for the nonlinear optical response.
Article
Optics
M. R. Maia, D. Jonathan, T. R. de Oliveira, A. Z. Khoury, D. S. Tasca
Summary: Interference is a mechanism to structure waves into fascinating patterns, playing a crucial role in sensing, imaging, trapping, and fundamental research. This study shows how to structure light into distributions with collapse and revival structures in its wavefront using coherent optical fields as probes.
Article
Multidisciplinary Sciences
Martin Luttmann, Mekha Vimal, Matthieu Guer, Hergott Jean-Francois, Antonio Z. Khoury, Carlos Hernandez-Garcia, Emilio Pisanty, Thierry Ruchon
Summary: Symmetries and conservation laws of energy, linear momentum, and angular momentum are important in nonlinear optics. Recently, there has been interest in paraxial light fields with nontrivial topology. These light fields, despite not being eigenstates of orbital and spin angular momenta, are eigenstates of the generalized angular momentum (GAM) operator, which is a mixture of the orbital and spin angular momentum operators with fractional eigenvalues. By using a polarization Mobius strip with a half-integer GAM charge, we demonstrate the linear scaling of GAM with harmonic order in high harmonic generation, with each harmonic carrying a precise half-integer GAM charge. Our work suggests that GAM is an appropriate quantum number in certain situations, paving the way for further manipulation and application of light beams with fractional-order polarization singularities.
Article
Optics
D. Martinez-Tibaduiza, C. Gonzalez-Arciniegas, C. Farina, A. Cavalcanti-Duriez, A. Z. Khoury
Summary: Using the Wei-Norman theory, a time-dependent complex Riccati equation is obtained as the solution for the time evolution operator of quantum systems with time-dependent Hamiltonians. The TDCRE is solved recursively as generalized continued fractions, and the conditions for unitarity are established. The symmetry of quantum systems can be recognized through the TDCRE, allowing for the association of effective quantum Hamiltonians.
Article
Optics
A. C. Duriez, D. Martinez-Tibaduiza, A. Z. Khoury
Summary: Algebraic methods are used to investigate the performance of quantum thermal machines. The thermodynamic properties of an Otto cycle engine composed of two coupled qubits are examined, with different temperature and frequency settings analyzed to determine the corresponding operation modes. The efficiency is compared between weak and strong coupling regimes.
Article
Optics
M. H. M. Passos, A. de Oliveira Junior, M. C. de Oliveira, A. Z. Khoury, J. A. O. Huguenin
Article
Optics
H. M. Faria, K. Dechoum, A. Z. Khoury
Article
Optics
Antonio Z. Khoury, Paulo H. Souto Ribeiro, Kaled Dechoum
Article
Optics
W. T. Buono, A. Santos, M. R. Maia, L. J. Pereira, D. S. Tasca, K. Dechoum, T. Ruchon, A. Z. Khoury
Article
Optics
B. Pinheiro da Silva, D. S. Tasca, E. F. Galvao, A. Z. Khoury
Article
Optics
R. A. Ribeiro, A. A. Matoso, L. E. Oxman, A. Z. Khoury, S. Padua
