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Highly Localized Surface Plasmon Nanolasers via Strong Coupling.

Jun-Wei Liao1, Zhen-Ting Huang1, Chia-Hung Wu2

  • 1Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.

Nano Letters
|May 8, 2023
PubMed
Summary

Researchers developed room-temperature plasmonic nanolasers using metallic nanoholes and InP nanowires. These compact, low-power coherent light sources enhance light-matter interactions for advanced integrated circuits and sensing applications.

Keywords:
Localized surface plasmonNanowirePlasmonic nanolaserStrong couplingSurface plasmon polariton

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Area of Science:

  • Photonics
  • Nanotechnology
  • Optoelectronics

Background:

  • Surface plasmons offer strong light field confinement, enhancing light-matter interactions.
  • Surface Plasmon Amplification by Stimulated Emission of Radiation (SPACER) is a promising technology for compact coherent light sources on semiconductor chips, potentially extending Moore's Law.

Purpose of the Study:

  • To demonstrate localized surface plasmon lasing at room temperature in the communication band.
  • To utilize metallic nanoholes as plasmonic nanocavities and InP nanowires as gain media for nanolaser development.
  • To optimize laser performance through controlled coupling of metallic nanoholes.

Main Methods:

  • Fabrication of metallic nanoholes as plasmonic nanocavities.
  • Integration of Indium Phosphide (InP) nanowires as the gain medium.
  • Characterization of localized surface plasmon lasing at room temperature.
  • Optimization of laser properties by tuning the coupling between nanoholes.

Main Results:

  • Successful demonstration of room-temperature localized surface plasmon lasing in the communication band.
  • Achieved lower power consumption and smaller mode volumes compared to conventional lasers.
  • Observed higher spontaneous emission coupling factors due to enhanced light-matter interactions.
  • Demonstrated performance optimization by manipulating the coupling between metallic nanoholes.

Conclusions:

  • Plasmonic nanolasers based on metallic nanoholes and InP nanowires are viable room-temperature coherent light sources.
  • Enhanced light-matter interactions lead to improved laser performance metrics.
  • These nanolasers hold significant promise for applications in high-density sensing and photonic integrated circuits.