Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Design of a subwavelength all-metal grating for generating azimuthally polarized beams based on modified particle swarm optimization

Not Accessible

Your library or personal account may give you access

Abstract

A subwavelength metal grating for generating azimuthally polarized beams was designed. The grating material was determined by calculating the total thermal conductivity coefficient. A modified particle swarm optimization (PSO), which has a two-step algorithm structure, and a particle position-determined inertia weight was performed to establish the grating’s structural parameters. Results show that an Au–Ti–Cu all-metal structure provides good thermal conductivity. A high duty cycle structure gives the grating high polarization selectivity of approximately 82.63% at 10.6 μm and a minimum of 26.39% in the 9.6–11.6 μm band. The modified PSO is more efficient and requires fewer calculations while maintaining accuracy. The geometrical parameter tolerances were also analyzed. The groove depth fabrication tolerance is 200 nm, and the sidewall angle fabrication tolerance is 19°, which means that the optimized structure is insensitive to structural parameter deviations.

© 2019 Optical Society of America

Full Article  |  PDF Article
More Like This
Generation of azimuthally polarized beams in fast axial flow CO2 laser with hybrid circular subwavelength grating mirror

Jiang Zhao, Bo Li, Heng Zhao, Wenjin Wang, Yi Hu, Sisi Liu, and Youqing Wang
Appl. Opt. 53(17) 3706-3711 (2014)

Polarization-insensitive subwavelength grating reflector based on a semiconductor-insulator-metal structure

Anjin Liu, Feiya Fu, Yufei Wang, Bin Jiang, and Wanhua Zheng
Opt. Express 20(14) 14991-15000 (2012)

Particle swarm optimizer for the surface plasmon resonance effect on metal gratings

Felipe José Lucena de Araujo, Ernande Ferreira de Melo, and Eduardo Fontana
Appl. Opt. 62(23) 6120-6130 (2023)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (5)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved