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Related Experiment Video

Updated: Jul 5, 2026

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
13:02

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation

Published on: February 25, 2017

Lasing characteristics and stress-tuning effects in GaN beam microcavities.

Yitong Chen1,2, Ying Yang2, Xuefeng Fan1,2

  • 1National and Local Joint Engineering Laboratory of RF Integration and Micro-assembly Technology, College of Integrated Circuit Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China. zhugangyi@njupt.edu.cn.

Nanoscale
|July 3, 2026
PubMed
Summary

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This summary is machine-generated.

Researchers developed a novel gallium nitride (GaN) microcavity. This study reveals how stress in GaN beams affects their light-emitting properties, paving the way for advanced sensors.

Area of Science:

  • Optoelectronics
  • Materials Science
  • Nanotechnology

Background:

  • Gallium nitride (GaN) microcavities offer unique optomechanical properties.
  • Understanding stress effects on GaN bandgaps is crucial for device performance.

Purpose of the Study:

  • To investigate lasing characteristics and stress-bandgap coupling in novel GaN microcavities.
  • To explore the optomechanical responses of GaN beams under induced stress.

Main Methods:

  • Fabrication of GaN beams (50-150 μm) using micro-nanofabrication.
  • Analysis via COMSOL simulations and confocal micro-photoluminescence (μ-PL) spectroscopy.
  • Development of a theoretical model for stress-bandgap coupling.

Main Results:

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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Related Experiment Videos

Last Updated: Jul 5, 2026

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
13:02

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation

Published on: February 25, 2017

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

  • A linear correlation between beam length and stress distribution was observed.
  • Maximum stress reached 1.0736 × 10-4 MPa with 0.5268 pm displacement.
  • Stress-induced bandgap narrowing caused a redshift in Fabry-Perot (FP) lasing (Q factors up to 1486).

Conclusions:

  • Bending strain in GaN beams reduces the bandgap via lattice deformation and piezoelectric fields.
  • A quantitative linear stress-bandgap relationship was established and experimentally validated.
  • This work enables high-resolution, high-sensitivity optomechanical sensors with dual light emission and sensing functions.