Cavity modes are a consequence of constructive interference of EM waves in a particular region. It is common knowledge that the (frequency) linewidth of a cavity resonance is broadened by both homogeneous (energy loss/damping) and inhomogeneous (non-uniform environment) effects. The linewidth due to homogeneous damping is inversely proportional to the lifetime of the cavity mode. I believe that 'integral intensity' of the resonance uniquely defines how much energy is within the mode, and that the integral intensity and the linewidth in combination uniquely define the amplitude of the mode.
I am curious about resonances of destructive interference. They can also be characterized by a linewidth, integral intensity, and an amplitude. However, in this case, the resonance corresponds to the absence of EM modes at a particular frequency. What do linewidth, integral intensity, and amplitude indicate for a resonance of destructive interference? It should be pretty similar, because both cavity modes and destructive interference resonances are the consequence of interference, the only difference is whether the interference is constructive or destructive.
Maybe there are some texts of spectral analysis or characterization of resonances that could help clarify this?
Thanks!
-Ryan
Dear Researcher,
Your question is interesting. Unfortunately I do not know the answer but I will follow your question and if you find something interesting, I attach it.
As the researcher( Amipara Manilal ) reported, the destructive part is rarely addressed, but the phenomena are similar.
Phenomenally, both are same, but useful part is constructive interference, hence the other part is never discussed. However, it's the same
Line width indicates no energy band or area of energy gap, as there is no energy, intensity or amplitude in energy term, meaningless.
It could be useful if there is to much channel consetion, how one interfere the other
Dear Researcher,
Your question is interesting. Unfortunately I do not know the answer but I will follow your question and if you find something interesting, I attach it.
As the researcher( Amipara Manilal ) reported, the destructive part is rarely addressed, but the phenomena are similar.
Yeah, that was my feeling. They are caused by the same physics, so there must be many analogies between the two. The case of destructive interference is useful sometimes though, for instance, in anti-reflective coatings.
Amipara Manilal D Could you elaborate on the line width and energy? It sounded like you were saying something interesting, but it was a little hard to catch exactly what you meant. Thanks everyone.
When EM waves from common source, traveling through two (or more) different paths and meets at point in space, there are possibilities to meet in phase or out of phase. (Other than that is of no importance).
In phase is additive power called constructive and out of phase is subtractive power called destructive.
If both the signal have same amplitude, double the power for constructive and zero power for destructive
Hope this suffice
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Electromagnetics
- Electromagnetic Fields