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In this paper, the bandwidth and saturation current of uni-traveling-carrier photodiode (UTC-PD) is investigated by using physics-based modeling. To further improve the performance, novel device structures are proposed. On the one hand, graded bandgap structure is employed in the absorption layer. It is shown that similar to the effect of graded doping method, the electric field in the absorption...
In this paper, broadband including microwave and millimeter-wave (mmW) characteristics of conventional optoelectronic devices with emphasis on waveguide photodetector (WGPD), traveling-wave (TW) photodetector and modulator are compared with our newly proposed substrate integrated electro-optical devices. In the newly proposed devices, substrate integrated circuit (SIC) concept is applied to the design...
The concept of substrate integrated circuit (SIC) is applied to the optoelectronic devices. The design and analysis of the new optoelectronic devices, including SIC photodetector and SIC modulator, are presented. The SIC concept can be applied to the isotropic and anisotropic substrate with single or multilayer geometry. Photodetectors and modulators can be integrated with the other microwave devices...
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