Journal
PHYSICAL REVIEW B
Volume 88, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.88.241403
Keywords
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Funding
- US Department of Energy (Basic Energy Sciences, Division of Materials Sciences and Engineering) [DE-AC02-07CH11358]
- Greek GSRT [ERC-02 EXEL]
- NSFC [11174221, 10974144]
- CNKBRSF [2011CB922001]
- China Scholarship Council [201206260055]
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Here, we present a mechanism for tailoring the photonic band structure of a quarter-wave stack without changing its physical periods by embedding conductive sheets. Graphene is utilized and studied as a realistic, two-dimensional conductive sheet. In a graphene-embedded quarter-wave stack, the synergic actions of Bragg scattering and graphene conductance contributions open photonic gaps at the center of the reduced Brillouin zone that are nonexistent in conventional quarter-wave stacks. Such photonic gaps show giant, loss-independent density of optical states at the fixed lower-gap edges, of even-multiple characteristic frequency of the quarter-wave stack. The conductive sheet-induced photonic gaps provide a platform for the enhancement of light-matter interactions.
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