研究目的
To enhance the effective radiated power of a 465 nm GaN-based VCSEL by coupling with a surface plasmon resonance mode induced on an Al rectangular grating.
研究成果
The proposed Al rectangular grating on a GaN-based VCSEL enhances effective radiated power by 30% compared to conventional structures, through surface plasmon resonance. The enhancement depends on structural parameters like material, period, depth, and dipole location, with Al being most effective in the blue range. This provides a low-cost and simple technique for improving VCSEL performance.
研究不足
The study is based on simulations, not experimental validation, which may not fully capture real-world complexities. The optimization is specific to the blue wavelength range (465 nm) and may not generalize to other wavelengths. The use of specific software tools and assumptions (e.g., refractive indices) could introduce inaccuracies.
1：Experimental Design and Method Selection:
The study uses finite-difference time-domain (FDTD) method for simulations to investigate surface plasmon resonance effects. The design involves a GaN-based VCSEL with an Al rectangular grating deposited on the p-i-n layer to enhance light emission.
2：Sample Selection and Data Sources:
The simulation model is based on a VCSEL structure with specific materials and dimensions, including a microcavity with InGaN/GaN quantum wells and DBR mirrors. Data is generated through numerical simulations.
3：List of Experimental Equipment and Materials:
Software tools (FDTD Solutions and Crosslight APSYS) are used for simulations. Materials include GaN, AlN, InGaN, and metals like Al, Ag, Au for gratings.
4：Experimental Procedures and Operational Workflow:
Simulations are conducted by setting up the VCSEL structure in software, varying parameters such as grating material, period, depth, and dipole distance, and analyzing the effective radiated power and electric field intensity.
5：Data Analysis Methods:
The effective radiated power is calculated using the transmission box model in FDTD Solutions. Results are analyzed through spectra plots and electric field intensity distributions.
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