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Modern information technologies rely on controlling the flow of electrons through their charge and spin. A rapidly emerging alternative is to use the orbital motion of electrons, the way they circulate around atomic sites as a new carrier…

Mesoscale and Nanoscale Physics · Physics 2026-04-30 Sobhan Subhra Mishra , Ranjan Singh

In solids, electronic Bloch states are formed by atomic orbitals. While it is natural to expect that orbital composition and information about Bloch states can be manipulated and transported, in analogy to the spin degree of freedom…

Mesoscale and Nanoscale Physics · Physics 2021-10-12 Dongwook Go , Daegeun Jo , Hyun-Woo Lee , Mathias Kläui , Yuriy Mokrousov

Modern spintronics relies on the generation of spin currents through spin-orbit coupling. The spin-current generation has been believed to be triggered by current-induced orbital dynamics, which governs the angular momentum transfer from…

Mesoscale and Nanoscale Physics · Physics 2023-02-07 Hiroki Hayashi , Daegeun Jo , Dongwook Go , Tenghua Gao , Satoshi Haku , Yuriy Mokrousov , Hyun-Woo Lee , Kazuya Ando

The emergence of an orbital angular momentum (OAM) response to a charge current holds promise for technological applications, allowing electrical control of magnetization dynamics. Often, the OAM current is invoked in explaining…

Mesoscale and Nanoscale Physics · Physics 2025-08-12 Niels Henrik Aase , Erik Wegner Hodt , Karl Bergson Hallberg , Asle Sudbø , Jacob Linder

Besides a linear momentum, optical fields carry an angular momentum (AM), which have two intrinsic components: one is spin angular momentum (SAM) related to the polarization state of the field, and the other is orbital angular momentum…

Orbital angular momentum (OAM) has aroused a widespread interest in many fields, especially in telecommunications due to its potential for unleashing new capacity in the severely congested spectrum of commercial communication systems. Beams…

Applied Physics · Physics 2019-12-19 Rui Chen , Hong Zhou , Marco Moretti , Xiaodong Wang , Jiandong Li

As the traditional resources (frequency, time, space, etc.) are efficiently utilized, it becomes more and more challenging to satisfy the ever-lasting capacity-growing and users-boosting demand in wireless networks. Recently, the…

Signal Processing · Electrical Eng. & Systems 2018-04-23 Wenchi Cheng , Wei Zhang , Haiyue Jing , Shanghua Gao , Hailin Zhang

Using orbital angular momentum (OAM) currents in nanoelectronics, for example, for magnetization manipulation via spin-orbit torque (SOT), represents a growing field known as "spin-orbitronics". Here, using the density functional theory…

Materials Science · Physics 2025-02-14 Poonam Kumari , Cyrille Barreteau , Alexander Smogunov

Satellite-based quantum communications enable a bright future for global-scale information security. However, the spin orbital momentum of light, currently used in many mainstream quantum communication systems, only allows for quantum…

Quantum Physics · Physics 2020-07-07 Ziqing Wang , Robert Malaney , Jonathan Green

In a series of fundamental proof-of-principle experiments, comprising numerical, controlled laboratory, and real-world experimentation, we have shown that it is possible to use the angular momentum physical layer for radio science and radio…

Classical Physics · Physics 2013-02-18 F. Tamburini , B. Thidé , V. Boaga , F. Carraro , M. del Pup , A. Bianchini , C. G. Someda , F. Romanato

Light beams with orbital angular momentum (OAM) are convenient carriers of quantum information. They can be also used for imparting rotational motion to particles and provide high resolution in imaging. Due to the conservation of OAM in…

Orbital angular momentum (OAM) has been regarded as a potential dimension for optical communication and related fields. Despite several studies, the transmission of OAM beams through time-varying scattering media remains a challenge. In…

Optics · Physics 2026-05-08 Heshen Li , Jin Wei , Tianshun Zhang , Wen Chen

Orbital angular momentum (OAM) multiplexing provides an efficient method to improve data-carrying capacity in various quantum communication protocols. It is a precondition to distribute OAM multiplexed quantum resources in quantum channels…

Quantum Physics · Physics 2022-03-31 Li Zeng , Rong Ma , Hong Wen , Meihong Wang , Jun Liu , Zhongzhong Qin , Xiaolong Su

We present a novel optical device to encode and decode two bits of information into different Orbital Angular Momentum (OAM) states of a paraxial optical beam. Our device generates the four angular momentum states of order $\pm 2$ and…

Orbital angular momentum (OAM) has gained great interest due to its most attractive feature of high dimensionality, and several ground-breaking demonstrations in communication based on OAM multiplexing have been carried out. Accordingly, a…

Optics · Physics 2016-02-22 Zhihan Zhu , Wei Gao , Chunyuan Mu , Hongwei Li

Light carrying orbital angular momentum (OAM) has been shown to be of use in a disparate range of fields ranging from astronomy to optical trapping, and as a promising new dimension for multiplexing signals in optical communications and…

Optics · Physics 2017-04-07 Shibiao Wei , Stuart K. Earl , Xiao-Cong Yuan , Shan Shan Kou , Jiao Lin

The emerging field of orbitronics exploits the electron orbital momentum $\textit{L}$. Compared to spin-polarized electrons, $\textit{L}$ may allow magnetic-information transfera with significantly higher density over longer distances in…

The coupled transport of charge and orbital angular momentum (OAM) lies at the core of orbitronics. Here, we examine the reciprocal relation in orbital-charge-coupled transport in thin films, treating bulk and surface contributions on equal…

Mesoscale and Nanoscale Physics · Physics 2025-06-02 Dongwook Go , Tom S. Seifert , Tobias Kampfrath , Kazuya Ando , Hyun-Woo Lee , Yuriy Mokrousov

Vortices are whirling disturbances commonly found in nature ranging from tremendously small scales in Bose-Einstein condensates to cosmologically colossal scales in spiral galaxies. An optical vortex, generally associated with a spiral…

Optics · Physics 2021-08-23 Chenhao Wan , Jian Chen , Andy Chong , Qiwen Zhan

Quantum networks are the ultimate target in quantum communication, where many connected users can share information carried by quantum systems. The keystones of such structures are the reliable generation, transmission and manipulation of…

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