研究目的
To design and investigate bias-free operational uni-traveling-carrier photodiodes (UTC-PDs) for high-power pulsed millimeter-wave signal generation in the sub-terahertz regime.
研究成果
The study demonstrates that transient simulation can be used to design high-performance UTC-PDs under bias-free operation for high-power pulsed millimeter-wave signal generation in the sub-THz regime. The modified UTC-PD shows improved performance in terms of bandwidth and output power, making it suitable for applications in next-generation optical interconnect or coherent fiber communication systems.
研究不足
The study focuses on the design and simulation of UTC-PDs without physical fabrication and testing. The simulation does not include parasitic elements in actual circuits, which may affect the performance in real-world applications.
1：Experimental Design and Method Selection:
The study employs physics-based transient simulation to design and analyze UTC-PDs. The reliability of the simulation is verified by comparing with reported experimental results.
2：Sample Selection and Data Sources:
The epitaxial layers of the original device from a reported study are used as a reference point for designing and analyzing to obtain a higher performance structure.
3：List of Experimental Equipment and Materials:
The study uses commercial Silvaco software (ATLAS) for transient simulations, applying drift-diffusion and energy balance models.
4：Experimental Procedures and Operational Workflow:
The performance of the zero-bias operational UTC-PD is analyzed as a function of the parameters of the absorption layer, spacer layers, and collection layer through transient simulation.
5：Data Analysis Methods:
The simulation results are compared with experimental results to verify the accuracy of the simulation. The performance between original and optimal structure is compared under excitation of pulse train and sinusoidal optical signals.
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