Total absorption by degenerate critical coupling
Abstract
We consider a mirror-symmetric resonator with two ports. We show that, when excited from a single port, complete absorption can be achieved through critical coupling to degenerate resonances with opposite symmetry. Moreover, any time two resonances with opposite symmetry are degenerate in frequency and absorption is always significantly enhanced. In contrast, when two resonances with the same symmetry are nearly degenerate, there is no absorption enhancement. We numerically demonstrate these effects using a graphene monolayer on top of a photonic crystal slab, illuminated from a single side in the near-infrared.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 23, 2014
- Source ID
- 10.1063/1.4885517
Entities
People
- Jessica R. Piper
- Shanhui Fan
- Victor Liu
Organizations
- Air Force Office of Scientific Research
- Stanford University