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

Asymmetric long-range hybrid-plasmonic modes in asymmetric nanometer-scale structures

Not Accessible

Your library or personal account may give you access

Abstract

The structural symmetry required for long-range surface-plasmon-polariton modes to take place is examined and mapped to asymmetric plasmonic structures. This study leads to a design methodology that facilitates the realization through systematic design of long-range modes in any asymmetric hybrid plasmonic waveguide (AHPW). Examining the modal behavior of an AHPW reveals that field symmetry on either side of the metal is the only necessary condition for plasmonic structures to support long-range propagation. We report that this field symmetry condition can be satisfied irrespective of asymmetry in a waveguide structure, material, or even field profile. The structure is analyzed using the coupled mode theory, transfer matrix method, and finite-difference time-domain method. The AHPW supports high-loss antisymmetric and long-range symmetric supermodes. Dispersion of these supermodes with respect to waveguide dimensions display similar anticrossing characteristics to those obtained in two coupled harmonic oscillators, where the propagation losses display peaks and troughs in the vicinity of the anticrossing region. To place the work in perspective, an AHPW with a width of 200 nm was found to support a long-range supermode with a subwavelength mode area of 0.23μm2 and propagation loss of 0.025dB·μm1 at the wavelength of 1550 nm, providing a radically improved attenuation confinement trade-off compared with other common types of plasmonic waveguides.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Hybrid long-range surface plasmon-polariton modes with tight field confinement guided by asymmetrical waveguides

Jianjun Chen, Zhi Li, Song Yue, and Qihuang Gong
Opt. Express 17(26) 23603-23609 (2009)

Hollow hybrid plasmonic waveguide for nanoscale optical confinement with long-range propagation

Tarun Sharma and Mukesh Kumar
Appl. Opt. 53(9) 1954-1957 (2014)

Long-range surface plasmon-polariton waveguide sensors with a Bragg grating in the asymmetric double-electrode structure

Yang Hyun Joo, Seok Ho Song, and Robert Magnusson
Opt. Express 17(13) 10606-10611 (2009)

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 (9)

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

Select as filters


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