![Experimental Comparison of UTC- and PIN-Photodiodes for Continuous-Wave Terahertz Generation | SpringerLink Experimental Comparison of UTC- and PIN-Photodiodes for Continuous-Wave Terahertz Generation | SpringerLink](https://media.springernature.com/lw685/springer-static/image/art%3A10.1007%2Fs10762-019-00638-5/MediaObjects/10762_2019_638_Fig1_HTML.png)
Experimental Comparison of UTC- and PIN-Photodiodes for Continuous-Wave Terahertz Generation | SpringerLink
![Frequency response modeling and optimization of a PIN photodiode based on GaN/InGaN adapted to photodetection at a wavelength of 633 nm - ScienceDirect Frequency response modeling and optimization of a PIN photodiode based on GaN/InGaN adapted to photodetection at a wavelength of 633 nm - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0254058415301656-gr2.jpg)
Frequency response modeling and optimization of a PIN photodiode based on GaN/InGaN adapted to photodetection at a wavelength of 633 nm - ScienceDirect
![Photodiode Theory of Operation | Optoelectronic Components | LEDs, Laser Diodes & Detectors | AP Technologies UK Photodiode Theory of Operation | Optoelectronic Components | LEDs, Laser Diodes & Detectors | AP Technologies UK](https://www.aptechnologies.co.uk/images/img/ODC/PhotodiodeStructure.png)