Fundamental absorption bandwidth to thickness limit for transparent homogeneous layers
Journal Article
·
· Nanophotonics (Online)
- Pratt School of Engineering , Duke University , Durham , NC , 27705 , USA
Abstract Past work has considered the analytic properties of the reflection coefficient for a metal-backed slab. The primary result established a fundamental relationship for the minimal layer thickness to bandwidth ratio achievable for an absorber. There has yet to be establishment of a similar relationship for non-metal-backed layers, and here we present the universal result based on the Kramers–Kronig relations. Our theory is validated with transfer matrix calculations of homogeneous materials, and full-wave numerical simulations of electromagnetic metamaterials. Our results place more general fundamental limits on absorbers and thus will be important for both fundamental and applied studies.
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0014372
- OSTI ID:
- 2320329
- Journal Information:
- Nanophotonics (Online), Journal Name: Nanophotonics (Online) Journal Issue: 9 Vol. 13; ISSN 2192-8614
- Publisher:
- Walter de Gruyter GmbHCopyright Statement
- Country of Publication:
- Germany
- Language:
- English
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