scholarly journals Usability of Tilted Plasmon Antenna with Structured Light

Photonics ◽  
2021 ◽  
Vol 8 (11) ◽  
pp. 504
Author(s):  
Rafael Quintero-Torres ◽  
Jorge Luis Domínguez-Juárez ◽  
Mariia Shutova ◽  
Alexei V. Sokolov
Keyword(s):  
Angular Momentum ◽  
Numerical Simulations ◽  
Field Distribution ◽  
Orbital Angular Momentum ◽  
Near Field ◽  
Dielectric Surface ◽  
Antenna Design ◽  
Oblique Angle ◽  
Oblique Illumination ◽  
To Receive

We study the effect of oblique illumination on the functioning of a plasmonic nanoantenna for chiral light. The antenna is designed to receive a structured beam of light and produce a nanosized near-field distribution that possesses nonzero orbital angular momentum. The design consists of metal (gold) microrods laid on a dielectric surface and is compatible with well-developed nanofabrication techniques. Experimental arrangements often require such an antenna to operate in a tilted geometry, where input light is incident on the antenna at an oblique angle. We analyze the limitations that the angled illumination imposes and discuss approaches to mitigate these limitations. Through our numerical simulations, we find that tilt angles require modifications to the antenna design. Our analysis can guide current and future experimental configurations to push the limits of resolution and sensitivity.

scholarly journals Usability of Tilted Plasmon Antenna with Structured Light

2021 ◽  
Author(s):  
Rafael Quintero-Torres ◽  
Jorge Luis Domínguez-Juárez ◽  
Mariia Shutova ◽  
Alexei V. Sokolov
Keyword(s):  
Angular Momentum ◽  
Numerical Simulations ◽  
Field Distribution ◽  
Orbital Angular Momentum ◽  
Near Field ◽  
Dielectric Surface ◽  
Antenna Design ◽  
Oblique Angle ◽  
Oblique Illumination ◽  
To Receive

We study the effect of oblique illumination on the functioning of a plasmonic nanoantenna for chiral light. The antenna is designed to receive a structured beam of light and produce a nanosized near-field distribution that possesses non-zero orbital angular momentum. The design consists of metal (gold) micro-rods laid on a dielectric surface and is compatible with well-developed nanofabrication techniques. Experimental arrangements often require such an antenna to operate in a tilted geometry, where input light is incident on the antenna at an oblique angle. We analyze the limitations that the angled illumination imposes and discuss approaches to mitigate these limitations. Through our numerical simulations, we find that tilt angles larger than 30 degrees require modifications to the antenna design. Our analysis guides current and future experimental configurations to pushing the limits of resolution and sensitivity.

scholarly journals Near-field collimation of light carrying orbital angular momentum with bull’s-eye-assisted plasmonic coaxial waveguides

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Mingbo Pu ◽  
Xiaoliang Ma ◽  
Zeyu Zhao ◽  
Xiong Li ◽  
Yanqin Wang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Near Field ◽  
Bull's Eye ◽  
Coaxial Waveguides

scholarly journals On-Chip Guiding of Higher-Order Orbital Angular Momentum Modes

Photonics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 72 ◽  
Author(s):  
In Joon Lee ◽  
Sangin Kim
Keyword(s):  
Angular Momentum ◽  
Field Distribution ◽  
Orbital Angular Momentum ◽  
Rotational Symmetry ◽  
Higher Order ◽  
Waveguide Structure ◽  
Rotation Symmetry ◽  
Gaussian Mode ◽  
On Chip ◽  
Topological Charges

Higher-order orbital angular momentum (OAM) mode guiding in a waveguide which is suitable for on-chip integration has been investigated. Based on the relation between the Laguerre-Gaussian mode and the Hermite-Gaussian mode, it has been shown that two degenerate guided modes of π/2l-rotation symmetry can support the l-th order OAM mode. In order to mimic the rotational symmetry, we have proposed the waveguide structure of a cross-shaped core and designed a waveguide that can support OAM modes of ±1 and ±2 topological charges simultaneously at a wavelength of 1550 nm. Purity of the OAM modes guided in the designed waveguide has been assessed by numerically calculating their topological charges from the field distribution, which were close to the theoretical values. We also investigated the guiding of OAM modes of ±3 and ±4 topological charges in our proposed waveguide structure, which revealed the possibility of the separate guiding of those OAM modes with relatively lower purity.

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