Trying to ubderstand the power distribution in fft plot

clear all
close all
clc
L=10;
n=1.45;
c=2.9979e8;
dt = 6e-12;
T=10*2*L*n/c;
eps0=8.854e-12;
A=80e-12;
t = (-T/2/dt:1:T/2/dt)*dt;
Nt=round(T/dt);
fsine = 1e9;
vsine = 1;
phi = vsine*sin(2*pi*fsine*t);
EL1t=1.274e7*exp(1i*phi);
FP=fft(phi);
fs=1/dt/Nt;
Fs=(-1/dt/2:fs:1/dt/2-1);

figure
Z=plot(Fs,fftshift(abs(fft(EL1t/Nt).^2*2*n*c*eps0*A)));
As you see from the obtained fft plot , the peak of the graph at 0Hz is around 60W , but I am struggling to understand how the power is distributed throughout the plot.
The given input power is 100W I think. Shouldn’t the central frequency at 0Hz be around 100W.
Where did the rest of power is what I am not understanding…clear all
close all
clc
L=10;
n=1.45;
c=2.9979e8;
dt = 6e-12;
T=10*2*L*n/c;
eps0=8.854e-12;
A=80e-12;
t = (-T/2/dt:1:T/2/dt)*dt;
Nt=round(T/dt);
fsine = 1e9;
vsine = 1;
phi = vsine*sin(2*pi*fsine*t);
EL1t=1.274e7*exp(1i*phi);
FP=fft(phi);
fs=1/dt/Nt;
Fs=(-1/dt/2:fs:1/dt/2-1);

figure
Z=plot(Fs,fftshift(abs(fft(EL1t/Nt).^2*2*n*c*eps0*A)));
As you see from the obtained fft plot , the peak of the graph at 0Hz is around 60W , but I am struggling to understand how the power is distributed throughout the plot.
The given input power is 100W I think. Shouldn’t the central frequency at 0Hz be around 100W.
Where did the rest of power is what I am not understanding… clear all
close all
clc
L=10;
n=1.45;
c=2.9979e8;
dt = 6e-12;
T=10*2*L*n/c;
eps0=8.854e-12;
A=80e-12;
t = (-T/2/dt:1:T/2/dt)*dt;
Nt=round(T/dt);
fsine = 1e9;
vsine = 1;
phi = vsine*sin(2*pi*fsine*t);
EL1t=1.274e7*exp(1i*phi);
FP=fft(phi);
fs=1/dt/Nt;
Fs=(-1/dt/2:fs:1/dt/2-1);

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