Photodetectors are devices used for the detection of light. They are used primarily as an optical...

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Photodetectors are devices used for the detection of light. They are used primarily as an optical receiver to convert light into electricity. A commonly used photodetector is the photodiode. A photodiode is a type of photodetector that is used to convert light into current so that optical power can be measured. You have been given the task of designing a photodetector for an optical local area network which uses GaAs laser diode light source (free space wavelength , 850 nm). You decide to use a silicon photodiode, which responds well at this wavelength. Silicon has relative permittivity &, = 11.9 air D=? 1 TiO) material=? (SiO, or silicon To improve the photo response, you decide to add an antireflection coating to the photodiode as shown in figure. You have equipment that can deposit either Sio, (refractive index n = 1.45) or TiO2 (refractive index n = 2.25) coating. Determine which of the two available materials gives the best antireflection coating and determine the optimum thickness for the coating. Photodetectors are devices used for the detection of light. They are used primarily as an optical receiver to convert light into electricity. A commonly used photodetector is the photodiode. A photodiode is a type of photodetector that is used to convert light into current so that optical power can be measured. You have been given the task of designing a photodetector for an optical local area network which uses GaAs laser diode light source (free space wavelength , 850 nm). You decide to use a silicon photodiode, which responds well at this wavelength. Silicon has relative permittivity &, = 11.9 air D=? 1 TiO) material=? (SiO, or silicon To improve the photo response, you decide to add an antireflection coating to the photodiode as shown in figure. You have equipment that can deposit either Sio, (refractive index n = 1.45) or TiO2 (refractive index n = 2.25) coating. Determine which of the two available materials gives the best antireflection coating and determine the optimum thickness for the coating.