Article
Materials Science, Multidisciplinary
Guo Liang, Bingli Yuan, Yuan Li, Xiangwei Kong, Wenjing Cheng, Hongzhen Qiao, Xubo Hu
Summary: The evolutionary properties of optical vortices overlaid with Gaussian backgrounds in optical tweezers were analyzed. A Tornado-like pattern, with superior trapping ability for microparticles, is obtained when the Gaussian background is wide enough compared to the optical vortices. The Tornado-like pattern shows similar structures in intensity and phase, with the latter being a clockwise rotation of the former.
RESULTS IN PHYSICS
(2021)
Article
Optics
Timo A. Nieminen, Mark L. Watson, Vincent L. Y. Loke, Alexander B. Stilgoe, Halina Rubinsztein-Dunlop
Summary: For typical cases where rotating optical tweezers are used for measurements, the error caused by spin-orbit conversion is unimportant. However, there are cases where measuring only the spin torque would be completely erroneous.
Article
Nanoscience & Nanotechnology
Liuhao Zhu, Xiaohe Zhang, Guanghao Rui, Jun He, Bing Gu, Qiwen Zhan
Summary: This study presents a novel optical skipping rope technology that transfers transverse orbital angular momentum to trapped particles, enabling their rotation and specific orbital motion parallel to the optical axis. This innovative technology significantly increases the manipulation freedom of optical tweezers, holding great significance for optical manipulation, micromechanics, and celestial orbit mimicry applications.
Review
Nanoscience & Nanotechnology
Robert J. C. Spreeuw
Summary: The insight that optical vortex beams carry orbital angular momentum has led to a wide range of applications and studies. Recent research explores the coupling of transverse orbital and spin angular momentum in laser beams, leading to new effects like the deflection of light beams by atoms and the trapping of atoms at a small distance away from the optical axis. This research opens up new possibilities for controlling the motion of atoms in optical tweezers and potential applications in quantum gates and interferometry.
Article
Optics
Xiaojin Yin, Ziyue Zhao, Pengqi Hao, Jinhong Li
Summary: The spin-orbit interactions of circularly polarized beams and circularly polarized vortex beams in radial gradient-index (GRIN) fibers are analyzed using the generalized Huygens-Fresnel principle and the GRIN fiber's ABCD matrix. The spin angular momentum (SAM) is only related to the polarization helicity, while the orbital angular momentum (OAM) is only related to the topological charge m. These two quantities do not crosstalk or convert between each other. No spin-orbit interactions occur at the focal plane of the GRIN fiber. The same characteristics are observed for partially coherent circularly polarized beams and partially coherent circularly polarized vortex beams in the GRIN fiber.
Article
Physics, Applied
Chenwen Yang, Yu-Tao Tan, Hong Chen, Jie Ren
Summary: This study demonstrates the topological one-way waveguide mode of the acoustic wave in a topological phononic crystal system, where the symmetry-broken acoustic unit cell allows for the presence of both spin-like pseudospin mode and real spin angular momentum in the topological state. By rotating the unit cells, topological phase transition and spin angular momentum reversal can be induced, leading to robust transport of one-way interface modes excited by acoustic spin sources with tight spin-momentum locking.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Optics
Yuan Zhou, Yanan Zhang, Xiaohao Xu, Manuel Nieto-Vesperinas, Shaohui Yan, Manman Li, Wenyu Gao, Yao Zhang, Baoli Yao
Summary: The Belinfante spin momentum (BSM) is a fundamental and mysterious quantity of electromagnetic fields. While it is undetectable in the global momentum of the field, it can be observed locally as an optical force on small particles. However, previous research has only established the concept of BSM force within the dipole approximation and lacked experimental evidence for its impact on multipoles.
LASER & PHOTONICS REVIEWS
(2023)
Article
Multidisciplinary Sciences
Konstantin Y. Bliokh, Horst Punzmann, Hua Xia, Franco Nori, Michael Shats
Summary: This article introduces the fundamental concepts of spin and momentum in quantum particles or fields, and their specific manifestations in wave fields. It demonstrates, through experiments, the natural generation of the Belinfante-Rosenfeld construction in gravity waves and explores the universality of these concepts and the significance of a new research platform.
Article
Astronomy & Astrophysics
Stephon Alexander, Christian Capanelli, Elisa G. M. Ferreira, Evan McDonough
Summary: This study investigates the spin of cosmic filaments in theories of ultra-light dark matter and finds that a collection of dark vortices can explain the recent observational evidence. By using a two-parameter analytic model to simulate a collection of vortices, an excellent fit to the data is obtained, and constraints on the number of vortices, the dark matter mass, and the radius of the inner core region are determined.
Article
Multidisciplinary Sciences
Shubo Wang, Guanqing Zhang, Xulong Wang, Qing Tong, Jensen Li, Guancong Ma
Summary: The study demonstrates the existence of acoustic spin-orbit interactions and rich phenomena beyond traditional acoustic systems through theoretical and experimental evidence of artificial transversality in airborne sound in an acoustic micropolar metamaterial.
NATURE COMMUNICATIONS
(2021)
Article
Optics
Yiqi Fang, Meng Han, Peipei Ge, Zhenning Guo, Xiaoyang Yu, Yongkai Deng, Chengyin Wu, Qihuang Gong, Yunquan Liu
Summary: This study investigates the conversion of the photon's orbital angular momentum into spin under strong magnetic field, and verifies this conversion through experiments. The findings have implications for controlling photoelectron holography and coherent extreme-ultraviolet radiations.
Article
Physics, Applied
Marko Simic, Doris Auer, Christian Neuper, Nikola Simic, Gerhard Prossliner, Ruth Prassl, Christian Hill, Ulrich Hohenester
Summary: This article proposes and demonstrates a scheme for optical nanoparticle characterization, which achieves real-time optical counting with single-particle sensitivity and high throughput. By monitoring the trajectories and velocity changes of each tracked particle, detailed information about the particle size distribution can be obtained. The experimental results show that this method is suitable for various applications.
PHYSICAL REVIEW APPLIED
(2022)
Article
Optics
Yichen Ma, Haoqi Zhao, Na Liu, Zihe Gao, Seyed Sepehr Mohajerani, Licheng Xiao, James Hone, Liang Feng, Stefan Strauf
Summary: Researchers demonstrate a method to control the spin angular momentum and orbital angular momentum of light by coupling a quantum emitter with a ring resonator. They achieve spin-orbit locking and chiral single-photon emission and create optical vortices carrying orbital angular momentum states.
Article
Optics
Petr Bouchal, Zdenek Bouchal
Summary: Manipulating angular momentum of light is achieved through changes in geometric phase in anisotropic nanostructures or optical interface phenomena. This study demonstrates a geometric phase that overcomes Brewster angle limitations and provides high variability in the modulation of light reflected from a planar isotropic interface. The discovered reflective spin-orbit interaction allows for the design of a double-helix focusing sensor for precise depth measurements in microscopy imaging.
LASER & PHOTONICS REVIEWS
(2023)
Review
Physics, Multidisciplinary
Graham D. Bruce, Paloma Rodriguez-Sevilla, Kishan Dholakia
Summary: This article discusses the fastest-spinning man-made object, the smallest wind-up motor, and how torque exerted by light can be used to rotate optically trapped particles. The principles, limitations, and potential applications of this technology are detailed in the review.
ADVANCES IN PHYSICS-X
(2021)
Review
Chemistry, Multidisciplinary
Judith Langer, Dorleta Jimenez de Aberasturi, Javier Aizpurua, Ramon A. Alvarez-Puebla, Baptiste Auguie, Jeremy J. Baumberg, Guillermo C. Bazan, Steven E. J. Bell, Anja Boisen, Alexandre G. Brolo, Jaebum Choo, Dana Cialla-May, Volker Deckert, Laura Fabris, Karen Faulds, F. Javier Garcia de Abajo, Royston Goodacre, Duncan Graham, Amanda J. Haes, Christy L. Haynes, Christian Huck, Tamitake Itoh, Mikael Ka, Janina Kneipp, Nicholas A. Kotov, Hua Kuang, Eric C. Le Ru, Hiang Kwee Lee, Jian-Feng Li, Xing Yi Ling, Stefan A. Maier, Thomas Mayerhofer, Martin Moskovits, Kei Murakoshi, Jwa-Min Nam, Shuming Nie, Yukihiro Ozaki, Isabel Pastoriza-Santos, Jorge Perez-Juste, Juergen Popp, Annemarie Pucci, Stephanie Reich, Bin Ren, George C. Schatz, Timur Shegai, Sebastian Schlucker, Li-Lin Tay, K. George Thomas, Zhong-Qun Tian, Richard P. Van Duyne, Tuan Vo-Dinh, Yue Wang, Katherine A. Willets, Clauanlai Xu, Hongxin Xu, Yikai Xu, Yuko S. Yamamoto, Bing Zhao, Luis M. Liz-Marzan
Review
Chemistry, Multidisciplinary
Hana Sipova-Jungova, Daniel Andren, Steven Jones, Mikael Kall
Article
Optics
Samira Khadir, Daniel Andren, Patrick C. Chaumet, Serge Monneret, Nicolas Bonod, Mikael Kall, Anne Sentenac, Guillaume Baffou
Article
Biology
Mikael Molin, Katarina Logg, Kristofer Bodvard, Ken Peeters, Annabelle Forsmark, Friederike Roger, Anna Jorhov, Neha Mishra, Jean-Marc Billod, Sabiha Amir, Mikael Andersson, Leif A. Eriksson, Jonas Warringer, Mikael Kall, Anders Blomberg
Article
Nanoscience & Nanotechnology
Samira Khadir, Daniel Andren, Ruggero Verre, Qinghua Song, Serge Monneret, Patrice Genevet, Mikael Kall, Guillaume Baffou
Summary: An optical metasurface is composed of scattering nanostructures and can be used to design ultrathin lenses, beam deflectors, and holograms. Improving metasurface design involves developing postcharacterization techniques, with quadriwave lateral shearing interferometry being a versatile method for achieving full optical characterization of metasurfaces.
Article
Chemistry, Multidisciplinary
Barbora Spackova, Hana Sipova-Jungova, Mikael Kall, Joachim Fritzsche, Christoph Langhammer
Summary: Research shows that applying nanofluidics to plasmonic nanoparticles can achieve efficient single-molecule detection in ultra-small sample volumes, which conventional microfluidic devices cannot accomplish. By downsizing fluidic structures, both detection times and the number of detected binding events can be significantly improved.
Article
Multidisciplinary Sciences
Falko Schmidt, Hana Sipova-Jungova, Mikael Kaell, Alois Wuerger, Giovanni Volpe
Summary: Active nanoparticles in a critical solution show behavior far from equilibrium, with fast orbital rotations observed around the beam axis even with an increase in effective temperature.
NATURE COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Daniel Andren, Denis G. Baranov, Steven Jones, Giovanni Volpe, Ruggero Verre, Mikael Kall
Summary: Utilizing optomechanical effects, optical metavehicles can be constructed for microscopic particles to travel long distances under low-intensity plane-wave illumination and be steered by the polarization of the incident light. Demonstrating movement in complex patterns, self-correcting motion, and application as transport vehicles for microscopic cargoes, including unicellular organisms. The abundance of possible optical metasurfaces suggests the potential for developing a wide variety of metavehicles with specialized functional behaviors.
NATURE NANOTECHNOLOGY
(2021)
Article
Optics
Rajath Sawant, Daniel Andren, Renato Juliano Martins, Samira Khadir, Ruggero Verre, Mikael Kall, Patrice Genevet
Summary: The study focuses on correcting various aberrations in optical systems using hybrid metalenses. Results show that at centimeter-scale hybrid metalenses, chromatic aberration and spherical aberration can be corrected by at least 80% and 70% respectively. The flexibility of adjusting various optical parameters with hybrid metasurfaces opens up new design opportunities for compact and broadband imaging, augmented reality/virtual reality, and holographic projection.
Article
Physics, Multidisciplinary
Falko Schmidt, Agnese Callegari, Abdallah Daddi-Moussa-Ider, Battulga Munkhbat, Ruggero Verre, Timur Shegai, Mikael Kaell, Hartmut Loewen, Andrea Gambassi, Giovanni Volpe
Summary: Researchers have demonstrated the tunable repulsive critical Casimir forces, which are important for the development of micro- and nanodevices. The stiction between parts in micro- and nanodevices, caused by attractive Casimir-Lifshitz forces, has been successfully counteracted by the repulsive critical Casimir forces. This breakthrough provides active control and precise tunability in the forces acting between the constituent parts.
Article
Optics
Mohammad Mahdi Shanei, Einstom Engay, Mikael Kaell
Summary: Researchers have proposed an ultra-thin silicon-based metasurface technology that enables simultaneous confinement and propulsion of microparticles, allowing for the trapping and transport of microscopic particles in a thin liquid cell. This technology is expected to play a significant role in areas such as miniaturized optical sensing, driving, and sorting.
Article
Optics
Mindaugas Juodenas, Erik Strandberg, Alexander Grabowski, Johan Gustavsson, Hana Sipova-Jungova, Anders Larsson, Mikael Kall
Summary: Flat metaoptics components have the potential to replace classical optics elements, leading to compact biophotonics devices when integrated with on-chip light sources and detectors. However, shaping light into wide angular range wavefronts with high efficiency using metasurfaces, as required in high-contrast microscopy applications, remains a challenge.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Review
Nanoscience & Nanotechnology
Daniel Midtvedt, Vasilii Mylnikov, Alexander Stilgoe, Mikael Kall, Halina Rubinsztein-Dunlop, Giovanni Volpe
Summary: The deep-learning revolution is providing new opportunities for manipulating and harnessing light. It has already shown success in improving the design of nanophotonic devices and analyzing experimental data. However, challenges arise in understanding and interpreting the results and reliability of deep learning.
Proceedings Paper
Engineering, Electrical & Electronic
Rajath Sawant, Daniel Andren, Mikael Kall, Ruggero Verre, Patrice Genevet
2020 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2020)
Article
Nanoscience & Nanotechnology
Denis G. Baranov, Battulga Munkhbat, Nils Odebo Lank, Ruggero Verre, Mikael Kall, Timur Shegai