Question

2-1: GaAs has a refractive index of 3.68 and an absorption coefficient of 1.3x10 m' at 800 nm. Calculate the transmission coefficient and optical density of a GaAs plate of thickness 2.0 micrometers 2-2: The complex dielectric function of a metal at IR frequency can be described by the following: w, +i Eow where E, is the relative static dielectric constant, o is the w and is the angle frequency. Estimate the reflectivity of a silver mirror electrical conductivity, at a wavelength of 100 um, assuming that ee and the conductivity of silver is 6.6x107 m/2

Answer 1

2.1. n = 3.68 L = 1.38 10 h thickness t = 2 x 100 m. 0.672 lectron coefficient, R= (long? (2.68)² (1+n)2 (4.68) 2 Transminion oefficiunt T= (1-R)? edt =(1-0-672) -(3X2) 0.0499 optical duisity = -log, oledt) = -log, (0.0499) = 1.302 tow 2.2. Era Ertig [ There is a typo in ques it writes a tow. No = Wy to it is Exter] .6, titz е, >> е, ю и сли учаuѕt thе ty Now ñg = ser & 5% = Er i take ño = n, tina » 50 = n2 = n3 + 2in, ma comparing we get 2,2- n = 0 &n="2 20, P2 - e com os meno letowe

In case of & . compter reflectiue inden | -|*. (1-x); n, Tita12 (1+2²+1, 2 IC [W=216 na na * * *s See more See level anxayot } 6.68107 2x8.854x1512 x 25*3x10° 1ooxlot : 4.45 X 10° V 2
100 % reflectivity.