Electrically pumped large-area Dirac-vortex lasers

Dr Ma, Jingwen   (Principal Investigator (PI))

Professor Yin Xiaobo   (Co-Investigator)

Professor Zhang Shuang   (Co-Investigator)

36

2025-10-01

1163861

Electrically pumped large-area Dirac-vortex lasers

semiconductor lasers, photonic crystals, photonic nano-structures, topological defect modes, nano-fabrications

PhotonicsNanomaterials

Engineering (E)

17208725

General Research Fund (GRF) 2025/26

2025

On-going

To develop efficient theoretical and numerical methods for designing electrically pumped Dirac-vortex lasers. These methods should accurately model photonic fields in devices with large cavity area of 5 mm × 5 mm and nanostructures as small as 70 nm, which typical multiphysics simulation software cannot handle.To fabricate electrically pumped Dirac-vortex cavities on engineered III-V epitaxy wafers. The devices should exhibit spontaneous electroluminescence spectra modified by the Dirac-vortex resonance at near-infrared wavelengths.To achieve electrically pumped lasing operation from the Dirac-vortex cavity. Key features of an electrically pumped laser would be characterized, including threshold, linewidth, lasing power, spatial coherence, and divergent angle.To optimize the electrical contact and thermal management issues to maximize the efficiency and output power of the device. The peak power should be > 0.5 watt under pulsed pump current.