研究目的
Investigating the optical properties of an ARROW-VCSEL with an oxide island to understand how it affects laser modes and enables single-mode operation with high power emission.
研究成果
The oxide island in the ARROW-VCSEL significantly influences lateral modes by inducing resonance and anti-resonance states, which can be controlled by adjusting the island's radius via oxidation time. This allows for enhanced modal discrimination, potentially enabling single-mode operation with high power, and the BETM method effectively models these effects.
研究不足
The study is purely numerical and computational, lacking experimental validation; it may not account for all real-world manufacturing variations or material imperfections in VCSELs.
1：Experimental Design and Method Selection:
The study employs the Bessel Expansion Transfer Method (BETM), a numerical method based on the Plane-Wave Admittance Method, adapted for axisymmetric structures using Fourier-Bessel expansion in cylindrical coordinates to solve Maxwell equations and analyze electromagnetic modes in photonic structures.
2：Sample Selection and Data Sources:
The analysis focuses on a VCSEL designed for 850 nm wavelength emission, with two oxidation layers: one forming a 10 μm electrical aperture and the other an oxide island with diameter varying from 0 to 6 μm.
3：List of Experimental Equipment and Materials:
No specific equipment or materials are listed; the study is numerical and computational.
4：Experimental Procedures and Operational Workflow:
The method involves expanding electric and magnetic fields using Bessel functions, formulating matrix equations, and using admittance transfer techniques to find eigenmodes and compute complex resonant frequencies and optical field distributions.
5：Data Analysis Methods:
Numerical analysis of photon lifetime and resonant wavelength dependence on oxide island diameter and cavity length, with results visualized in figures to show modal discrimination and field profile changes.
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