High-Speed Plasmonic Electro-Optic Beam Deflectors

Martin Thomaschewski*, Christian Wolff, Sergey I. Bozhevolnyi

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Abstrakt

Highly integrated active nanophotonics addressing both device footprint and operation speed demands is a key enabling technology for the next generation optical networks. Plasmonic systems have proven to be a serious contender to alleviate current performance limitations in electro-optic devices. Here, we demonstrate a plasmonic optical phased array (OPA) consisting of two 10 μm long plasmonic phase shifters, utilized to control the far-field radiation pattern of two subwavelength-separated emitters for aliasing-free beam steering with an angular range of ±5° and flat frequency response up to 18 GHz (with the potential bandwidth of 1.2 THz). Extreme optical and electrostatic field confinement with great spatial overlap results in high phase modulation efficiency (VπL = 0.24 Vcm). The demonstrated approach of using plasmonic lithium niobate technology for optical beam manipulation offers inertia-free, robust, ultracompact, and high-speed beam steering.

OriginalsprogEngelsk
TidsskriftNano Letters
Vol/bind21
Udgave nummer9
Sider (fra-til)4051-4056
ISSN1530-6984
DOI
StatusUdgivet - 30. apr. 2021

Bibliografisk note

Funding Information:
The authors acknowledge funding support from the VKR Foundation (Award in Technical and Natural Sciences 2019) and the VILLUM FONDEN (Grant 16498). C.W. acknowledges funding from a MULTIPLY fellowship under the Marie Skłodowska-Curie COFUND Action (Grant Agreement 713694)

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