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Proceedings Paper

Active asymmetric plasmonic Bragg gratings
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Paper Abstract

We discuss asymmetric reflectance in surface plasmon Bragg gratings incorporating optical gain, referred to as active asymmetric surface plasmon Bragg gratings. It is shown that balanced modulation of index and gain/loss with quarter pitch spatial shift causes unidirectional coupling between contra-propagating modes in long-range surface plasmon polariton Bragg gratings. Such gratings operate at the breaking threshold of parity-time symmetry (exceptional point). Two active asymmetric surface plasmon Bragg gratings designs are proposed and their performance is examined through modal and transfer matrix method computations.

Paper Details

Date Published: 16 September 2016
PDF: 6 pages
Proc. SPIE 9920, Active Photonic Materials VIII, 99201T (16 September 2016); doi: 10.1117/12.2238704
Show Author Affiliations
Elham Karami Keshmarzi, Carleton Univ. (Canada)
Choloong Hahn, Hanyang Univ. (Korea, Republic of)
Seok Ho Song, Hanyang Univ. (Korea, Republic of)
Cha Hwan Oh, Hanyang Univ. (Korea, Republic of)
R. Niall Tait, Carleton Univ. (Canada)
Pierre Berini, Univ. of Ottawa (Canada)

Published in SPIE Proceedings Vol. 9920:
Active Photonic Materials VIII
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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