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Updated: Dec 14, 2025

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

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Published on: August 5, 2013

Enhanced lasing behavior enabled by guided-mode resonance structure embedded with double waveguide layers.

Kangni Wang, Tao Cui, Linyong Qian

|July 17, 2020

Summary

This summary is machine-generated.

By incorporating a laser dye into a guided-mode resonance (GMR) structure with polyurethane layers, researchers achieved a fivefold enhancement in lasing emission. This GMR structure optimizes dye excitation and light extraction for improved laser performance.

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Area of Science:

Photonics
Materials Science
Optics

Background:

Guided-mode resonance (GMR) structures offer unique optical properties for light manipulation.
Laser dyes are crucial for tunable laser sources, but their efficiency can be limited by excitation and emission processes.

Purpose of the Study:

To enhance lasing emission in a GMR structure by doping laser dye into polyurethane layers.
To investigate the effect of matching GMR wavelengths with dye absorption and emission spectra.
To analyze the impact on linewidth and threshold characteristics.

Main Methods:

Fabrication of a GMR structure with alternating polyurethane and Ta2O5 layers.
Doping laser dye into the polyurethane layers.
Characterization of lasing emission, linewidth, and threshold under resonant conditions.

Main Results:

Achieved approximately fivefold enhancement in lasing emission.
Observed reduction in linewidth to approximately 1.06 nm.
Estimated threshold of approximately 0.92 mJ/cm² when excitation and extraction resonances align.

Conclusions:

Doping laser dye into polyurethane layers within a GMR structure significantly enhances lasing emission.
Matching GMR wavelengths with dye absorption and emission spectra is key to optimizing performance.
The GMR structure provides efficient excitation and directional light extraction, leading to improved laser characteristics.