scholarly journals Recovery and Characterization of Orbital Angular Momentum Modes with Ghost Diffraction Holography

2021 ◽  
Vol 11 (24) ◽  
pp. 12167
Author(s):  
Yanyan Huang ◽  
Vinu R.V. ◽  
Ziyang Chen ◽  
Tushar Sarkar ◽  
Rakesh Kumar Singh ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Optical Vortex ◽  
Mode Analysis ◽  
Complex Field ◽  
Experimental Demonstration ◽  
Speckle Field ◽  
Projection Scheme ◽  
Efficient Recovery

Orbital angular momentum (OAM) of optical vortex beams has been regarded as an independent physical dimension of light with predominant information-carrying potential. However, the presence of scattering environment and turbulent atmosphere scrambles the helical wavefront and destroys the orthogonality of modes in vortex beam propagation. Here, we propose and experimentally demonstrate a new basis for the recovery of the OAM mode using a holographic ghost diffraction scheme. The technique utilizes the speckle field generated from a rotating diffuser for optical vortex mode encoding, and the fourth-order correlation of the speckle field for the efficient recovery of the associated modes. Furthermore, we successfully demonstrate the complex-field recovery of OAM modes by the adoption of a holography scheme in combination with the ghost diffraction system. We evaluate the feasibility of the approach by simulation and followed by experimental demonstration for the recovery of various sequentially encoded OAM modes. Finally, the efficacy of the recovered modes was quantitatively analyzed by an OAM mode analysis utilizing orthogonal projection scheme.

scholarly journals Experimental demonstration of cylindrical vector spatiotemporal optical vortex

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jian Chen ◽  
Chenhao Wan ◽  
Andy Chong ◽  
Qiwen Zhan
Keyword(s):  
Angular Momentum ◽  
Optical Tweezers ◽  
Orbital Angular Momentum ◽  
Optical Vortex ◽  
Spin Orbit ◽  
Experimental Demonstration ◽  
Matter Interaction ◽  
Light Matter Interaction ◽  
Angular Momentum Coupling ◽  
Momentum Coupling

Abstract We experimentally generate cylindrically polarized wavepackets with transverse orbital angular momentum, demonstrating the coexistence of spatiotemporal optical vortex with spatial polarization singularity. The results in this paper extend the study of spatiotemporal wavepackets to a broader scope, paving the way for its applications in various areas such as light–matter interaction, optical tweezers, spatiotemporal spin–orbit angular momentum coupling, etc.

scholarly journals Optical vortex lattice: an exploitation of orbital angular momentum

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Liuhao Zhu ◽  
Miaomiao Tang ◽  
Hehe Li ◽  
Yuping Tai ◽  
Xinzhong Li
Keyword(s):  
Angular Momentum ◽  
Optical Tweezers ◽  
Orbital Angular Momentum ◽  
Vortex Lattice ◽  
Optical Vortex ◽  
Yeast Cells ◽  
Particle Manipulation ◽  
Complex Motion ◽  
Potential Applications ◽  
Vortex Beams

Abstract Generally, an optical vortex lattice (OVL) is generated via the superposition of two specific vortex beams. Thus far, OVL has been successfully employed to trap atoms via the dark cores. The topological charge (TC) on each optical vortex (OV) in the lattice is only ±1. Consequently, the orbital angular momentum (OAM) on the lattice is ignored. To expand the potential applications, it is necessary to rediscover and exploit OAM. Here we propose a novel high-order OVL (HO-OVL) that combines the phase multiplication and the arbitrary mode-controllable techniques. TC on each OV in the lattice is up to 51, which generates sufficient OAM to manipulate microparticles. Thereafter, the entire lattice can be modulated to desirable arbitrary modes. Finally, yeast cells are trapped and rotated by the proposed HO-OVL. To the best of our knowledge, this is the first realization of the complex motion of microparticles via OVL. Thus, this work successfully exploits OAM on OVL, thereby revealing potential applications in particle manipulation and optical tweezers.

Experimental demonstration of 20  Gbit/s data encoding and 2  ns channel hopping using orbital angular momentum modes

2015 ◽  
Vol 40 (24) ◽  
pp. 5810 ◽  
Author(s):  
Asher J. Willner ◽  
Yongxiong Ren ◽  
Guodong Xie ◽  
Zhe Zhao ◽  
Yinwen Cao ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Experimental Demonstration ◽  
Data Encoding ◽  
Channel Hopping

Spin-Orbital Angular Momentum of Light and Its Application

2020 ◽  
Vol 29 (10) ◽  
pp. 28-31
Author(s):  
Teun-Teun KIM
Keyword(s):  
Angular Momentum ◽  
Quantum Entanglement ◽  
Orbital Angular Momentum ◽  
Phase Distribution ◽  
Optical Vortex ◽  
Spin Orbit ◽  
Vortex Beam ◽  
Spin Orbital ◽  
Matter Interaction ◽  
Light Matter Interaction

Like the eletron, the photon carries spin and orbital angular momentum caused by the polarization and the spatial phase distribution of light, respectively. Since the first observation of an optical vortex beam with orbital angular momentum (OAM), the use of an optical vortex beam has led to further studies on the light-matter interaction, the quantum nature of light, and a number of applications. In this article, using a metasurface with geometrical phase, we introduce the fundamental origins and some important applications of light with spin-orbit angular momentum as examples, including optical vortex tweezer and quantum entanglement of the spin-orbital angular momentum.

scholarly journals Characterization of LDPC-coded orbital angular momentum modes transmission and multiplexing over a 50-km fiber

2016 ◽  
Vol 24 (11) ◽  
pp. 11716 ◽  
Author(s):  
Andong Wang ◽  
Long Zhu ◽  
Shi Chen ◽  
Cheng Du ◽  
Qi Mo ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum
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