9. Consider TE oblique incidence with 30 degree incidence angle from the air (n=1) to the semiconduc tor (n=3.5). The optical wavelength is 1.5 um. We want to coat a thin film on the semiconductor to achieve zero reflection for this particular case. The coating material is with the refractive index n and the thickness d. (1) What is the power reflectivity of the interface without the coating. (2) Please determine the required d and n to achieve zero reflectivity.
9. Consider TE oblique incidence with 30 degree incidence angle from the air (n=1) to the semiconduc tor (n=3.5). The optical wavelength is 1.5 um. We want to coat a thin film on the semiconductor to achieve zero reflection for this particular case. The coating material is with the refractive index n and the thickness d. (1) What is the power reflectivity of the interface without the coating. (2) Please determine the required d and n to achieve zero reflectivity.
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Transcribed Image Text:9. Consider TE oblique incidence with 30 degree incidence angle from the air (n=1) to the semiconduc
tor (n=3.5). The optical wavelength is 1.5 µm. We want to coat a thin film on the semiconductor to
achieve zero reflection for this particular case. The coating material is with the refractive index n and
the thickness d.
(1) What is the power reflectivity of the interface without the coating.
(2) Please determine the required d and n to achieve zero reflectivity.
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