4. An aluminum antimonide solid state laser emits light with a wavelength of 730 nm. Calculate...
4. An aluminum antimonide solid state laser emits light with a wavelength of 730 nm. Calculate the band gap (energy) in joules.
Homework Answers
Band Gap energy = 
.
We know that the Band gap is the energy difference between the Valence band(VB) and the conduction band(CB) of the solids. From Plank's equation, we get that,
where 
the Energy difference between Vb and CB
c - speed of light = 
Wavelength of the aluminum antimonide solid-state laser = 
= 
h = Plank's constant = 
hence,
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