keywords ADDITIONAL LAYER Avalache photodetectors CHARGE Circuit Modeling EXCESS NOISE FACTOR Engineering Engineering, Electrical & Electronic FREQUENCY-RESPONSE GAIN-BANDWIDTH PRODUCT HIGH-SPEED MULTIPLICATION NONUNIFORM ELECTRIC-FIELD Optics PHOTODIODES Physical Sciences Physics Physics, Applied RCE-APD RCE-SAGCM-APDs Resonant cavity enhanced SEPARATE-ABSORPTION Science & Technology Technology photodetectors photodiode