Article
Optics
Li -Ping Yang
Summary: The polarization vectors of light in a coiled optical fiber rotate around its axis of propagation even without birefringence, which can be explained by the Pancharatnam-Berri phase of spin-1 photons. A geometric method is used to understand this rotation and it is shown that similar geometric rotations also occur in twisted light with orbital angular momentum. The corresponding geometric phase has applications in photonic quantum computation and quantum sensing based on orbital angular momentum states.
Article
Chemistry, Analytical
Catalin Beguni, Alin-Mihai Cailean, Sebastian-Andrei Avatamanitei, Eduard Zadobrischi, Raul Stoler, Mihai Dimian, Valentin Popa, Bastien Bechadergue, Luc Chassagne
Summary: This article presents a new in-vehicle visible light communication system that provides car passengers with optical wireless communication. The proposed system includes a visible light communication emitter integrated into the vehicle's ambient lighting system and a mobile receiver. The experimental evaluation demonstrated the feasibility and effectiveness of the system, achieving a data rate of 250 kb/s with a BER lower than 10(-7).
Article
Optics
Petr Bouchal, Zdenek Bouchal
Summary: Twisted vector light beams can be generated by spiral phase modulation of light reflected by dielectric spheres, similar to the generation of optical vortices using liquid crystals and plasmonic metasurfaces. This discovery was demonstrated through holographic imaging of primary and secondary rainbows, proving the existence of spiral geometric phase. The study also confirmed that individual water drops can generate vector vortex beams under circularly polarized illumination, and spherical reflectors can serve as simple generators of vector vortex beams and vortex arrays, inspiring new geometric-phase elements.
LASER & PHOTONICS REVIEWS
(2022)
Article
Computer Science, Hardware & Architecture
Paa Kwesi Esubonteng, Roberto Rojas-Cessa
Summary: In this paper, a model of the coverage and achievable data rates in No Line-of-Sight Free-Space Optical Communications (NLOS-FSOC) is proposed as a function of the angle of incidence. This model focuses on an outdoor urban setting where mobile stations, represented by cars, travel through a city street. The results of extensive numerical evaluations show the effect of the incidence angle on the coverage, achievable data rates, and optimal placement and orientation of the DR and ground optical base stations in an NLOS-FSOC OLAN.
Article
Physics, Multidisciplinary
Yutaro Goto, Hajime Ishihara, Nobuhiko Yokoshi
Summary: In this theoretical study, the researchers investigate the impact of light's orbital angular momentum on chiral magnetic order in a metallic chiral helimagnet under resonant optical vortex beam irradiation. They propose a novel interaction between local spins based on microscopic interactions between an optical vortex and electrons, which modulates the chiral magnetic order in a different way than an external magnetic field. This spin modulation technique could open up possibilities to create unique topological or chiral structures for future opto-spintronic devices.
NEW JOURNAL OF PHYSICS
(2021)
Article
Optics
Hui Yang, Zhenwei Xie, Hairong He, Qiang Zhang, Xiaocong Yuan
Summary: Twisted light, with spatially varying phase or polarization, has various applications such as micro-particle manipulation, optical communication, and quantum information processing. Recent progress in on-chip twisted light generation from typical devices has been highlighted, aiming at addressing key research advances and technical challenges in this emerging research field.
Article
Chemistry, Analytical
Catalin Beguni, Alin-Mihai Cailean, Sebastian-Andrei Avatamanitei, Mihai Dimian
Summary: The use of Visible Light Communications (VLC) in vehicular applications is a major research area due to its simplicity and high performance. This article provides analysis and experimental evaluations on integrating light dimming function in vehicular VLC systems, showing the potential of VLC technology to support inter-vehicle communication links even in light dimming conditions.
Article
Optics
Ganesh Miriyala, V. V. Mani
Summary: This paper proposes a new modulation technique, LADO-OFDM, for VLC systems to mitigate mutual interference between signals, reduce computing complexity and latency. Simulation results show that the proposed scheme outperforms traditional ADO-OFDM in terms of BER performance.
Article
Optics
Yongguang Zhao, Changsheng Zheng, Zixuan Huang, Qinggang Gao, Jifei Dong, Kangzhen Tian, Zhiyong Yang, Weidong Chen, Valentin Petrov
Summary: This study demonstrates a single-crystal fiber laser amplifier that can directly amplify femtosecond optical vortices while maintaining their spatial properties. The optical nonlinearity experienced by these twisted light beams is weaker compared to fundamental mode beams. The simple design and power scaling capability of this amplifier pave the way for ultrahigh-intensity femtosecond singular laser sources. These laser sources can help reveal complex physical phenomena in light-matter interactions and expand applications in fields such as X-ray vortices, laser plasma acceleration, and micromachining.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
K. Koksal, M. Babiker, V. E. Lembessis
Summary: Recent studies have shown that radially-polarised optical modes with helical wave fronts can be generated in the laboratory. These modes carry only axial optical angular momentum (AM) and have zero spin angular momentum (SAM), indicating the presence of only orbital angular momentum (OAM) and no SAM. The helicity of these modes is proportional to the winding number (l) and displays chirality. When applied to Laguerre-Gaussian (LG) modes, the total helicity is determined by the action constant (Q) multiplied by the sign of (l/|l|), and this result holds for LG modes of any magnitude of the winding number (l). The magnitude of the action constant and hence the helicity decrease for LG modes with large beam waist (w0).
Article
Chemistry, Multidisciplinary
Kristan Bryan Simbulan, Yi-Jie Feng, Wen-Hao Chang, Chun- Lu, Ting-Hua Lu, Yann-Wen Lan
Summary: This study investigated the use of twisted light as an exciting light source onto a MoS2 photovoltaic device, demonstrating improvements in the device's photoresponse by increasing the incident light's quantized OAM, leading to enhanced optical absorption efficiency in MoS2. The research reveals the potential of utilizing twisted light for enhancing the performance of 2D-MoS2 in photovoltaic applications and envisions the use of light’s OAM for future energy device technologies.
Article
Multidisciplinary Sciences
S. Al-Awfi
Summary: This study explains how quadrupole-active atomic interactions are enhanced by interacting with evanescent winding light modes, and discusses the importance of the optical quadrupole potential generated in manipulating atoms. It also demonstrates the creation of evanescent modes with orbital angular momentum restricted near the dielectric surface.
JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Yanggang Feng, Linhang Ju, Hanze Jia, Houze Liu, Xilun Ding, Wuxiang Zhang
Summary: In this study, a wearable sensor using twisted carbon fiber and optical fiber embedded in fabric was proposed. The sensor can detect muscle activation during movement by converting light intensity loss to voltage loss. Experimental results showed that the sensor can effectively find the relationship between vastus medialis activation and tension in calf flexion and extension, and it is not sensitive to differences between the right and left legs.
IEEE SENSORS JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Aswini Kumar Pattanayak, Pritam Das, Devarshi Chakrabarty, Avijit Dhara, Shreya Paul, Satyait Maji, Maruthi Manoj Brundavanam, Sajal Dhara
Summary: This study proposes a novel mechanism to control the intravalley spin-flip scattering rate of excitons in spin-valley-coupled two-dimensional systems. By utilizing the characteristics of optical vortex beams, a unique approach to regulate the scattering rate of excitons is demonstrated and experimentally proven to be effective within a specific temperature range.
Article
Optics
Zhiwei Cui, Wanqi Ma, Shuaishuai Ren, Wenjuan Zhao
Summary: In this study, the researchers propose a method to control the chirality of twisted light using the tunable optical properties of graphene. They develop a theoretical model to investigate the chirality of twisted light reflected from a graphene-substrate interface. The results show that the chirality of twisted light can be flexibly tuned by adjusting the incident angle and the properties of the graphene and substrate materials. This tunable optical chirality has potential applications in various fields including chiral molecular recognition and micromanipulation.
OPTICS COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Siddarth Koduru Joshi, Jacques Pienaar, Timothy C. Ralph, Luigi Cacciapuoti, Will McCutcheon, John Rarity, Dirk Giggenbach, Jin Gyu Lim, Vadim Makarov, Ivette Fuentes, Thomas Scheidl, Erik Beckert, Mohamed Bourennane, David Edward Bruschi, Adam Cabello, Jose Capmany, Alberto Carrasco-Casado, Eleni Diamanti, Miloslav Dusek, Dominique Elser, Angelo Gulinatti, Robert H. Hadfield, Thomas Jennewein, Rainer Kaltenbaek, Michael A. Krainak, Hoi-Kwong Lo, Christoph Marquardt, Gerard Milburn, Momtchil Peev, Andreas Poppe, Valerio Pruneri, Renato Renner, Christophe Salomon, Johannes Skaar, Nikolaos Solomos, Mario Stipcevic, Juan P. Torres, Morio Toyoshima, Paolo Villoresi, Ian Walrnsley, Gregor Weihs, Harald Weinfurter, Anton Zeilinger, Marek Zukowski, Rupert Ursin
NEW JOURNAL OF PHYSICS
(2018)
Article
Optics
Bereneice Sephton, Adam Valles, Fabian Steinlechner, Thomas Konrad, Juan P. Torres, Filippus S. Roux, Andrew Forbes
Article
Quantum Science & Technology
Yuanyuan Chen, Matthias Fink, Fabian Steinlechner, Juan P. Torres, Rupert Ursin
NPJ QUANTUM INFORMATION
(2019)
Article
Optics
Emilio Pisanty, Gerard J. Machado, Veronica Vicuna-Hernandez, Antonio Picon, Alessio Celi, Juan P. Torres, Maciej Lewenstein
Article
Physics, Multidisciplinary
Roberto de J. Leon-Montiel, Jiri Svozilik, Juan P. Torres, Alfred B. U'Ren
PHYSICAL REVIEW LETTERS
(2019)
Article
Optics
J-R Alvarez, S. Sarmiento, J. A. Lazaro, J. M. Gene, J. P. Torres
Article
Optics
Daniel F. Urrego, Dorilian Lopez-Mago, Veronica Vicuna-Hernandez, Juan P. Torres
Article
Physics, Applied
Gerard J. Machado, Gaetano Frascella, Juan P. Torres, Maria V. Chekhova
APPLIED PHYSICS LETTERS
(2020)
Article
Multidisciplinary Sciences
Sebastian Toepfer, Marta Gilaberte Basset, Jorge Fuenzalida, Fabian Steinlechner, Juan P. Torres, Markus Grafe
Summary: Holography uses interference of a light field to reconstruct the spatial shape of an object, but traditional methods are limited by detection constraints outside the visible range. By implementing phase-shifting holography with nonclassical states of light and quantum interference between two-photon probability amplitudes, it is possible to overcome these limitations and retrieve the spatial shape of transmitted/reflected photons from the object.
Article
Optics
Arturo Villegas, Mario A. Quiroz-Juarez, Alfred B. U'Ren, Juan P. Torres, Roberto de J. Leon-Montiel
Summary: In this study, we propose and demonstrate a smart laser-diffraction analysis technique for identifying particle mixtures. By using model particles, we accurately retrieve information about two-component heterogeneous mixtures with high accuracy. The method simplifies implementation and paves the way for the development of novel smart identification technologies.
Article
Optics
Daniel F. Urrego, Juan P. Torres
Summary: We propose and experimentally demonstrate a quantum-inspired protocol for quantifying the degree of similarity between two spatial shapes in optical beams without the need for amplitude and phase measurement. Instead, the desired information can be obtained by measuring the degree of polarization of the combined optical beam, which is easier to implement experimentally. The protocol utilizes non-separable optical beams, where different degrees of freedom (polarization and spatial shape) cannot be described independently. One important feature of this method is its ability to compare two unknown spatial shapes.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2022)
Article
Optics
Arturo Rojas-Santana, Gerard J. Machado, Maria V. Chekhova, Dorilian Lopez-Mago, Juan P. Torres
Summary: This study analyzes and compares the output signals obtained in three different configurations of optical coherence tomography (OCT) in order to evaluate the performance of different configurations in extracting information about the sample. The configurations include standard OCT and two types of OCT schemes based on nonlinear interferometers, with the optical sectioning of the sample achieved by measuring the output signal spectrum.
Article
Optics
Oscar Cordero, Arturo Villegas, Juan-Rafael Alvarez, Roberto de J Leon-Montiel, M. H. M. Passos, Juan P. Torres
Summary: The concept of quantum discord aims to uncover quantum correlations beyond entanglement, but its original formulation is difficult to compute. Alternative forms like geometric measure and local quantum uncertainty have been developed, which can be easily evaluated in certain quantum systems. Research shows that these two measures are equivalent in 2xD dimensional bipartite quantum systems.
Article
Optics
Arturo Rojas-Santana, Gerard J. Machado, Dorilian Lopez-Mago, Juan P. Torres
Article
Optics
Adam Valles, Gerard Jimenez, Luis Jose Salazar-Serrano, Juan P. Torres
