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Plasmonic beaming and active control over fluorescent emission.

Young Chul Jun¹, Kevin C Y Huang, Mark L Brongersma

¹Geballe Laboratory for Advanced Materials, 476 Lomita Mall, Stanford, California 94305, USA.

Nature Communications

|April 21, 2011

Summary

This summary is machine-generated.

We developed a new, easily fabricated nanometallic optical antenna that precisely controls light emission. This plasmonic device integrates quantum dots and gratings for highly collimated beams and electrical tuning.

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Area of Science:

Optics
Nanotechnology
Materials Science

Background:

Nanometallic optical antennas are crucial for controlling light concentration and emission.
High-performance antennas with on-chip integration are highly sought after for advanced optical applications.

Purpose of the Study:

To demonstrate a novel, easily fabricated optical antenna design with enhanced control over fluorescent emission.
To combine plasmonics, radiative decay engineering, and optical beaming for superior performance.

Main Methods:

Fabrication of a nanoscale plasmonic cavity filled with quantum dots coupled to a miniature grating.
Utilizing electromagnetic simulations and confocal microscopy to visualize and analyze the light beaming process.
Engineering the antenna for electrical control of emission intensity and wavelength.

Main Results:

The new antenna design achieves unprecedented control over fluorescent emission.
The coupled grating structure generates one or more highly collimated beams.
Electrical tuning of emission intensity and wavelength is demonstrated using the plasmonic cavity metals.

Conclusions:

This work presents a new class of active optical antennas.
The findings facilitate the development of novel optical sources and nanoscale optical spectroscopy tools.
The easily fabricated design promotes facile integration on chips for widespread application.