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Updated: Jul 1, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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Published on: November 22, 2019

Tailorable Topological Multimode Nanolaser with Mutually Incoherent Modes.

Laura Yrjänheikki¹, Roman Calpe¹, Marek Nečada¹

¹Center for Photonics Sciences, University of Eastern Finland, FI-80100 Joensuu, Finland.

|June 29, 2026

Summary

This summary is machine-generated.

Researchers developed a tunable topological multimode nanolaser. This laser supports simultaneous lasing in different topological modes that are mutually incoherent, ideal for applications like multiplexed communication.

Keywords:

coherence nanolasers plasmonic lattices surface lattice resonances topological photonics

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Last Updated: Jul 1, 2026

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Area of Science:

Photonics
Nanotechnology
Topological Photonics

Background:

Topological photonics offers novel ways to control light.
Nanolasers are crucial for integrated photonic circuits.
Understanding mode interactions in nanolasers is key for device applications.

Purpose of the Study:

To demonstrate a tailorable topological multimode nanolaser.
To investigate the interplay between topologically distinct modes.
To explore the coherence properties of simultaneous lasing modes.

Main Methods:

Fabrication of gold nanoparticle arrays in a dye gain medium.
Angle- and wavelength-resolved spectroscopy.
Spatial and temporal coherence characterization using interferometry and cross-correlation frequency-resolved optical gating.

Main Results:

Simultaneous lasing in topologically trivial dipolar and nontrivial quasi-bound-state-in-the-continuum (qBIC) modes.
Mode behavior and far-field emission depend on nanoparticle size.
Topologically distinct modes exhibit orthogonal polarizations and are mutually incoherent.
Tunable contributions of lasing modes by adjusting nanoparticle geometry.

Conclusions:

Demonstrated a tailorable topological multimode nanolaser.
Showcased the potential for independent control of distinct topological modes.
Highlighted the advantage of mutual incoherence for applications like multiplexed communication and multichannel sensing.