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Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Published on: September 5, 2017

Unidirectional Lasing from Template-Stripped Two-Dimensional Plasmonic Crystals.

Ankun Yang¹, Zhongyang Li², Michael P Knudson¹

¹Department of Materials Science and Engineering, Northwestern University , Evanston, Illinois 60208, United States.

|October 13, 2015

Summary

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This summary is machine-generated.

Researchers developed unidirectional plasmon lasers using ultrasmooth 2D plasmonic crystals. This breakthrough overcomes limitations of traditional plasmon lasers, enabling single-direction emission for advanced optical devices.

Area of Science:

Plasmonics
Nanophotonics
Materials Science

Background:

Plasmon lasers enable sub-diffraction limit cavity structures.
Existing plasmon lasers often suffer from bidirectional emission, poor directionality, and high radiative losses.

Purpose of the Study:

To achieve unidirectional lasing emission from plasmonic crystals.
To investigate the influence of nanocavity design, materials, and gain media on lasing performance.

Main Methods:

Fabrication of ultrasmooth, template-stripped two-dimensional (2D) plasmonic crystals (Au or Ag).
Optical pumping of 2D plasmonic crystals integrated with dye molecules.
Tuning of lasing wavelength by modifying the dielectric environment.

Main Results:

Keywords:

plasmon nanolaser plasmonic crystals spaser template stripping unidirectional emission wavelength tunability

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Demonstrated unidirectional lasing from optically pumped 2D plasmonic crystals.
Achieved tunable lasing wavelengths by altering the surrounding dielectric environment.
Identified template-stripped plasmonic materials with cylindrical posts as optimal for room-temperature unidirectional lasing.

Conclusions:

Ultrasmooth, template-stripped 2D plasmonic crystals provide an ideal platform for unidirectional plasmon lasers.
The nanocavity unit-cell structure, metal material, and gain media significantly impact lasing characteristics.
Optimized designs enable efficient, unidirectional, and tunable room-temperature plasmon lasing.