If the rate of spontaneous emission, or any of the other rates are fast, the lifetime is short.
22.
Einstein's explanation of spontaneous emission also predicted the existence of stimulated emission, the principle upon which the laser rests.
23.
The phase of the photon in spontaneous emission is random as is the direction in which the photon propagates.
24.
A very well known example of a two-state system is the stimulated and spontaneous emission of photons from excited atoms.
25.
On this basis, physicists were searching for materials in which stimulated emission rather than spontaneous emission, is the dominant decay process.
26.
Contemporary physicists, when asked to give a physical explanation for spontaneous emission, generally invoke the zero-point energy of the electromagnetic field.
27.
:For Question 3, our article on spontaneous emission says the direction and phase of a spontaneously emitted photon are both random.
28.
The initial spontaneous emission is therefore amplified in the same manner as the signals, hence the term " Amplified Spontaneous Emission ".
29.
The initial spontaneous emission is therefore amplified in the same manner as the signals, hence the term " Amplified Spontaneous Emission ".
30.
Yablonovitch's main goal was to engineer photonic density of states to control the spontaneous emission of materials embedded in the photonic crystal.
