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All-plasmonic Optical Phased Array Integrated on a Thin-film Platform.

Yuan-Song Zeng¹, Shi-Wei Qu², Bao-Jie Chen³

¹School of Electronic Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, 611731, China.

Scientific Reports

|September 1, 2017

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This study introduces the first passive plasmonic optical phased array, enabling steerable beams and high directivity. This breakthrough bridges the gap between optical and radio frequency phased array technologies for advanced nanolinks and lasers.

Area of Science:

Photonics
Plasmonics
Nanotechnology

Background:

Optical phased arrays (OPAs) are crucial for applications like high-speed communications and lasers.
Existing OPAs primarily use silicon photonics, leaving plasmonic-based OPAs unexplored.

Purpose of the Study:

To propose and experimentally demonstrate a novel passive plasmonic optical phased array.
To show the applicability of radio frequency phased array theory to plasmonic systems.

Main Methods:

Design and fabrication of a passive plasmonic optical phased array.
Experimental demonstration of beam steering and directivity.
Application of radio frequency phased array theory to surface plasmon coupling.

Main Results:

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Successful demonstration of a passive plasmonic optical phased array.
Achieved steerable beams in the far-field with high directivity.
Validated the use of RF phased array theory for plasmonic OPAs, bridging wavelength gaps.

Conclusions:

The proposed plasmonic OPA offers a new platform for optical beam steering.
This technology has potential applications in on-chip optical wireless nanolinks, optical interconnections, and integrated plasmonic lasers.