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Dynamic Plasmonic Pixels.

Nicholas J Greybush1, Kristin Charipar1, Jeffrey A Geldmeier1

  • 1United States Naval Research Laboratory , 4555 Overlook Ave, SW , Washington , DC 20375 , United States.

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|February 23, 2019
PubMed
Summary
This summary is machine-generated.

Dynamic plasmonic pixels offer fast, reversible color control by aligning nanorods with electric fields. This breakthrough enables high-performance optical devices with tunable light modulation.

Keywords:
Au nanorod alignmentactive plasmonicscolor displayscore−shell nanorodsfast switching speedplasmonic pixel

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Area of Science:

  • Plasmonics
  • Nanotechnology
  • Optical Engineering

Background:

  • Plasmonic color generation offers an alternative to traditional displays but often lacks dynamic control.
  • Existing plasmonic displays are typically static or use slow switching mechanisms.

Purpose of the Study:

  • To demonstrate spatial, spectral, and temporal control of light using dynamic plasmonic pixels.
  • To engineer plasmonic nanorods for tunable light modulation across the visible and infrared spectrum.

Main Methods:

  • Utilizing electric-field-induced alignment of plasmonic nanorods (Au and Au@Ag) in organic suspensions.
  • Tailoring nanorod geometry and composition to control light modulation from 600-2400 nm.
  • Fabricating a seven-segment numerical indicator to showcase device integration.

Main Results:

  • Achieved fast (∼30 μs), reversible nanorod alignment leading to distinct color changes.
  • Demonstrated significant light modulation across the visible and infrared spectrum.
  • Successfully integrated dynamic plasmonic pixels into a functional seven-segment display.

Conclusions:

  • Dynamic plasmonic pixels provide on-demand control of light with fast switching speeds.
  • This technology establishes a favorable platform for developing high-performance optical devices.
  • The electric-field-induced alignment of plasmonic nanorods enables tunable chromaticity and luminance.