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Related Experiment Video

Updated: Mar 23, 2026

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
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Controlling Random Lasing with Three-Dimensional Plasmonic Nanorod Metamaterials.

Zhuoxian Wang1, Xiangeng Meng1, Seung Ho Choi2

  • 1School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University , 1205 West State Street, West Lafayette, Indiana 47907, United States.

Nano Letters
|March 30, 2016
PubMed
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Researchers developed novel plasmonic random lasers using 3D nanorod metamaterials. These lasers overcome typical metal absorption losses, showing improved performance with higher metal content for advanced coherent optical sources.

Area of Science:

  • Photonics and Laser Science
  • Materials Science and Engineering
  • Nanotechnology

Background:

  • Plasmonics has revolutionized laser science, enabling subwavelength nanolasers via surface plasmon amplification.
  • The influence of plasmonics on other laser systems remains largely unexplored.

Purpose of the Study:

  • To introduce a new class of random lasers utilizing 3D plasmonic nanorod metamaterials.
  • To investigate the effect of plasmonic nanostructures on laser performance, particularly concerning absorption losses.

Main Methods:

  • Fabrication of three-dimensional plasmonic nanorod metamaterials.
  • Characterization of laser performance, including lasing threshold and mode confinement.
  • Investigation of spectral profile modulation via pump light polarization.
Keywords:
Random lasersimaginglasing mode confinementmetamaterialsplasmonics

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Related Experiment Videos

Last Updated: Mar 23, 2026

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
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Trapping of Micro Particles in Nanoplasmonic Optical Lattice
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Main Results:

  • Demonstrated a significant decrease in lasing threshold with increased metal volume fraction (up to ~0.07), far exceeding previous optima.
  • Achieved spatially confined lasing modes within the plasmonic metamaterial.
  • Showcased efficient spectral profile tuning by adjusting pump light polarization.
  • Enabled full-field speckle-free imaging at micron scales using these plasmonic random lasers.

Conclusions:

  • Plasmonic metamaterials can enhance random laser performance, contrary to expectations regarding metal absorption losses.
  • These findings open avenues for novel coherent optical sources with tunable properties.
  • The developed plasmonic random lasers are suitable for advanced imaging applications.