Active asymmetric plasmonic Bragg gratings

Elham Karami Keshmarzi; Choloong Hahn; Seok Ho Song; Cha Hwan Oh; R. Niall Tait; Pierre Berini

doi:10.1117/12.2238704

16 September 2016 Active asymmetric plasmonic Bragg gratings

Elham Karami Keshmarzi, Choloong Hahn, Seok Ho Song, Cha Hwan Oh, R. Niall Tait, Pierre Berini

Proceedings Volume 9920, Active Photonic Materials VIII; 99201T (2016) https://doi.org/10.1117/12.2238704
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States

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.

Conference Presentation

Citation Download Citation

Elham Karami Keshmarzi, Choloong Hahn, Seok Ho Song, Cha Hwan Oh, R. Niall Tait, and Pierre Berini "Active asymmetric plasmonic Bragg gratings", Proc. SPIE 9920, Active Photonic Materials VIII, 99201T (16 September 2016); https://doi.org/10.1117/12.2238704

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