Mimicking surface polaritons for unpolarized light with high-permittivity materials
Journal Article
·
· Physical Review Materials
- California Institute of Technology (CalTech), Pasadena, CA (United States); Stanford Univ., CA (United States); DOE/OSTI
- California Institute of Technology (CalTech), Pasadena, CA (United States); Univ. of California, Los Angeles, CA (United States)
- National Chiao Tung Univ., Hsinchu (Taiwan)
- California Institute of Technology (CalTech), Pasadena, CA (United States)
Tailoring near-field optical phenomena often requires excitation of surface plasmon polaritons (SPPs) or surface phonon polaritons (SPhPs), surface waves at the interface between media with electric permittivities of opposite sign. Despite their unprecedented field confinement, surface polaritons are limited by polarization: only transverse magnetic fields enable their excitation, leaving transverse electric fields unexploited. By contrast, guided modes in positive permittivity materials occur for both linear polarizations, however, they typically cannot compete with SPPs and SPhPs in terms of confinement. Furthermore we show that omnipolarization guided modes in materials with high-permittivity resonances can reach confinement factors similar to SPPs and SPhPs, while surpassing them in terms of propagation distance. We explore the cases of silicon carbide and transition-metal dichalcogenides near their permittivity resonances, and compare with SPhPs in silicon carbide and SPPs in silver, at infrared and visible frequencies, respectively.
- Research Organization:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Organization:
- Air Force Office of Scientific Research; USDOE Office of Science (SC)
- Grant/Contract Number:
- FG02-07ER46405
- OSTI ID:
- 1609855
- Alternate ID(s):
- OSTI ID: 1490509
- Journal Information:
- Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 1 Vol. 3; ISSN PRMHAR; ISSN 2475-9953
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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