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Electrically Driven Unidirectional Optical Nanoantennas.

Surya Prakash Gurunarayanan^1,2, Niels Verellen^2,3, Vyacheslav S Zharinov³

¹Department of Materials Engineering, KU Leuven , B-3001 Leuven, Belgium.

|October 26, 2017

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This summary is machine-generated.

Electrically driven optical nanoantennas enable broadband unidirectional light emission for on-chip wireless communication. This breakthrough offers tunable directivity and a compact solution for directing optical energy, overcoming previous integration challenges.

Area of Science:

Optoelectronics
Nanotechnology
Telecommunication

Background:

Directional antennas are crucial for efficient radio and microwave signal transmission.
Optical nanoantennas hold promise for on-chip wireless communication and information processing.
Current on-chip nanoantenna integration faces challenges due to complex designs and excitation methods.

Purpose of the Study:

To experimentally demonstrate electrical driving of in-plane tunneling nanoantennas.
To achieve broadband unidirectional light emission from nanoantennas.
To explore methods for tuning nanoantenna directivity for on-chip applications.

Main Methods:

Fabrication of in-plane tunneling nanoantennas.
Electrical driving and characterization of light emission.

Keywords:

Optical nanoantenna antenna-coupled tunnel junction directional emission electrically driven electromigration surface plasmon resonance

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Tuning spectral overlap via applied voltage to control directivity.

Passive tunability through antenna geometry modification.

Main Results:

Achieved broadband unidirectional light emission.
Demonstrated electrical tunability of directivity up to 5 dB by tuning spectral overlap.
Showcased passive tunability of directivity via antenna geometry.
Confirmed the role of far-field interference between dipolar and quadrupole resonances.

Conclusions:

Electrically driven tunneling nanoantennas offer a novel approach for on-chip optical energy direction.
The demonstrated technology provides a simple, compact, and tunable solution for integrated photonic circuits.
This work paves the way for advanced on-chip wireless communication and optical information processing.