A partially depleted absorber photodetector with spacer layer is presented, which adopts Gaussian profile doping. The bandwidth is 59.8GHz and the quantum efficiency is 60.4%. The bandwidth efficiency product is 36.11GHz which is 49.7% higher than conventional partially depleted absorber photodetector under the same active area and bias voltage.
A novel high bandwidth-efficiency-product dual-absorption photodetector is designed. The 3dB bandwidth of 39.3GHz and the quantum efficiency of 63% are achieved, and thus the bandwidth-efficiency-product is improved by 30% compared with mushroom dual-absorption photodetector.
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