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Updated: Feb 19, 2026

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Optimization of TM modes for amorphous slab lasers.

Shampy Mansha, Zeng Yongquan, Qi Jie Wang

    Optics Express
    |November 3, 2017
    PubMed
    Summary

    Numerical study reveals amorphous photonic structures with dielectric veins significantly enhance transverse magnetic (TM) mode Q factors. This finding could advance random quantum cascade lasers.

    Area of Science:

    • Photonics
    • Materials Science
    • Condensed Matter Physics

    Background:

    • Amorphous photonic structures offer unique optical properties.
    • Dielectric structures are crucial for photonic device applications.
    • Honeycomb lattices exhibit interesting band structures.

    Purpose of the Study:

    • To numerically investigate two-dimensional amorphous photonic structures.
    • To explore the effect of dielectric veins on optical properties.
    • To assess the potential for enhanced Q factors in TM modes.

    Main Methods:

    • Numerical simulation of dielectric rods in a honeycomb-like lattice.
    • Analysis of structures with varying dielectric vein widths.
    • Calculation of in-plane Q factors for transverse magnetic (TM) modes.

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    Main Results:

    • Significant enhancement (two orders of magnitude) of in-plane Q factors for TM modes observed.
    • Enhancement attributed to short-range order in the amorphous lattice.
    • Weak dip in the density of states, not a prominent gap, was noted.

    Conclusions:

    • Amorphous photonic structures with specific vein widths can dramatically improve TM mode Q factors.
    • These structures show promise for developing multi-mode random quantum cascade lasers.
    • The findings contribute to the understanding of amorphous photonic materials for laser applications.