scholarly journals Transfer of orbital angular momentum of light to plasmonic excitations in metamaterials

2020 ◽  
Vol 6 (24) ◽  
pp. eaay1977
Author(s):  
T. Arikawa ◽  
T. Hiraoka ◽  
S. Morimoto ◽  
F. Blanchard ◽  
S. Tani ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Solid State ◽  
Orbital Angular Momentum ◽  
Room Temperature ◽  
Dipole Interaction ◽  
Localized Surface Plasmons ◽  
Vortex Beam ◽  
Atomic Systems ◽  
Electric Dipole Interaction ◽  
Efficient Transfer

The emergence of the vortex beam with orbital angular momentum (OAM) has provided intriguing possibilities to induce optical transitions beyond the framework of the electric dipole interaction. The uniqueness stems from the OAM transfer from light to material, as demonstrated in electronic transitions in atomic systems. In this study, we report on the OAM transfer to electrons in solid-state systems, which has been elusive to date. Using metamaterials (periodically textured metallic disks), we show that multipolar modes of the surface electromagnetic excitations (so-called spoof localized surface plasmons) are selectively induced by the terahertz vortex beam. Our results reveal selection rules governed by the conservation of the total angular momentum, which is confirmed by numerical simulations. The efficient transfer of light’s OAM to elementary excitations in solid-state systems at room temperature opens up new possibilities of OAM manipulation.

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.

Determining the Orbital Angular Momentum of Vortex Beam by Young’s Double-Slit Interference Experiment

2008 ◽  
Vol 35 (7) ◽  
pp. 1063-1067 ◽  
Author(s):  
陈子阳 Chen Ziyang ◽  
张国文 Zhang Guowen ◽  
饶连周 Rao Lianzhou ◽  
蒲继雄 Pu Jixiong
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Vortex Beam ◽  
Interference Experiment ◽  
Double Slit

Vortex beam of tilted orbital angular momentum generated from grating

2019 ◽  
Vol 61 (10) ◽  
pp. 105001
Author(s):  
Jing Qiu ◽  
Baifei Shen ◽  
Xiaomei Zhang ◽  
Zhigang Bu ◽  
Longqing Yi ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Vortex Beam

Rapid generation of perfect vortex beam without side lobes

2018 ◽  
Vol 32 (24) ◽  
pp. 1850289
Author(s):  
Siqi Li ◽  
Mulong Liu ◽  
Xingyi Li ◽  
Zhiqiang Ge ◽  
Lingxuan Zhang
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Optical Communication ◽  
Spatial Light Modulators ◽  
Vortex Beam ◽  
Digital Micromirror Device ◽  
Light Modulators ◽  
Rapid Generation ◽  
Rapid Switching ◽  
Topological Charges

We have proposed an approach for rapid generation of perfect vortex beam without side lobes through a digital micromirror device (DMD). Employing this method, the amplitude and phase of far field can be controlled indirectly by changing the rotation state of each unit on the DMD. The perfect vortex beams of equal rings diameter independent of their topological charges are generated commendably and the side lobes are avoided. Moreover, we have demonstrated rapid switching among the generated orbital angular momentum modes at the speed of 10 kHz, which is much faster than that of the usual method realized by spatial light modulators (SLMs). The proposed method is very beneficial for the optical communication and trapping or manipulating the small particle based on orbital angular momentum modes.

Detecting the topological charge of a vortex beam by an arc slit diffraction

2017 ◽  
Vol 31 (23) ◽  
pp. 1750172 ◽  
Author(s):  
Dongzhi Fu ◽  
Hailong Zhou ◽  
Kaiwei Wang ◽  
Pei Zhang ◽  
Jianji Dong ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Diffraction Pattern ◽  
Orbital Angular Momentum ◽  
Topological Charge ◽  
Light Spot ◽  
Far Field ◽  
Vortex Beam ◽  
Efficient Measurement ◽  
Vortex Beams

The simple and efficient measurement of the light orbital angular momentum (OAM) is essential to both the classical and quantum applications with vortex beams. Here, we study the diffraction pattern in the far field when a vortex beam passes through an arc slit and demonstrate experimentally that a light spot of the diffraction pattern has a displacement which is linear to the topological charge (TC) of the incident vortex beam. Based on this property, this method is capable of measuring both modulus and sign of TC of the vortex beam. Furthermore, this scheme allows identifying multiple OAM states simultaneously.

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