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Universal design method for bright quantum light sources based on circular Bragg grating cavities.

Ching-Wen Shih, Sven Rodt, Stephan Reitzenstein

    Optics Express
    |November 29, 2023
    PubMed
    Summary
    This summary is machine-generated.

    We developed a universal design for quantum light sources using hybrid circular Bragg gratings (CBGs). This efficient method significantly reduces simulation costs and enhances device performance for various wavelengths.

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    Area of Science:

    • Quantum optics and photonics
    • Nanophotonics and metamaterials
    • Semiconductor device engineering

    Background:

    • Efficient quantum light sources are crucial for quantum technologies.
    • Hybrid circular Bragg gratings (CBGs) offer a promising platform for enhancing light-matter interactions.
    • Previous designs faced computational challenges and limitations in adaptability.

    Purpose of the Study:

    • To develop an efficient and universal design scheme for quantum light sources based on hybrid CBGs.
    • To alleviate the computational cost associated with numerical simulations for CBG design.
    • To demonstrate high-performance CBG designs adaptable to realistic fabrication constraints.

    Main Methods:

    • Theoretical development of a universal design scheme for hybrid circular Bragg grating (CBG) cavities.
    • Numerical simulations utilizing the GaAs/SiO2/Au material system.
    • Analysis of performance metrics including Purcell factors and extraction efficiencies.

    Main Results:

    • Achieved remarkable Purcell factors > 26 and extraction efficiencies > 92% (without contact bridges) and > 86% (with contact bridges).
    • Covered emission wavelengths from 900 nm to 1600 nm, encompassing telecom O-band and C-band.
    • Demonstrated adaptability to realistic structural constraints (e.g., layer thicknesses) and different material systems.

    Conclusions:

    • The proposed design scheme is efficient, universal, and computationally inexpensive.
    • High design flexibility supports deterministic fabrication and in-situ adaptation for integrating quantum emitters.
    • This approach significantly increases the yield and spectral adaptability of quantum device fabrication.