Photonic Structures Flashcards
1
Q
What is a Bragg stack?
A
Alternate layers of two semiconductors which form mirrors at their boundaries.
2
Q
What happens to reflectivity as number of layer pairs increases in a Bragg stack?
A
The reflectivity increases.
3
Q
How is an optical cavity formed?
A
By trapping photons between two distributed Bragg stacks.
4
Q
What is the Purcell effect?
A
If an emitter is placed in an optical cavity its spontaneous emission rate can be enhance via its interaction with the cavity mode.
5
Q
What does the emission rate depend on?
A
The density of states into which a photon can be emitted.
