Role of surface electromagnetic waves in metamaterial absorbers
- Boston College, Chestnut Hill, MA (United States); Duke University
- Duke Univ., Durham, NC (United States)
- Boston College, Chestnut Hill, MA (United States)
- SensorMetrix, Inc., San Diego, CA (United States)
- Boston College, Chestnut Hill, MA (United States); Duke Univ., Durham, NC (United States)
Metamaterial absorbers have been demonstrated across much of the electromagnetic spectrum and exhibit both broad and narrow-band absorption for normally incident radiation. Absorption diminishes for increasing angles of incidence and transverse electric polarization falls off much more rapidly than transverse magnetic. We unambiguously demonstrate that broad-angle TM behavior cannot be associated with periodicity, but rather is due to coupling with a surface electromagnetic mode that is both supported by, and well described via the effective optical constants of the metamaterial where we achieve a resonant wavelength that is 19.1 times larger than the unit cell. Furthermore, experimental results are supported by simulations and we highlight the potential to modify the angular response of absorbers by tailoring the surface wave.
- Research Organization:
- Boston College, Chestnut Hill, MA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- SC0005240
- OSTI ID:
- 1255129
- Journal Information:
- Optics Express, Journal Name: Optics Express Journal Issue: 6 Vol. 24; ISSN 1094-4087; ISSN OPEXFF
- Publisher:
- Optical Society of America (OSA)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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