Reflection and transmission in nonlocal susceptibility models with multiple resonances
| Autor: | Thomas G. Philbin, R. J. Churchill |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Quantum Physics Uniaxial crystal Exciton Boundary (topology) FOS: Physical sciences 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Computational physics Dispersion relation 0103 physical sciences Reflection (physics) Statistical physics Boundary value problem Reflection coefficient 010306 general physics 0210 nano-technology Quantum Physics (quant-ph) Physics - Optics Optics (physics.optics) |
| DOI: | 10.48550/arxiv.1702.05058 |
| Popis: | We consider a semi-infinite dielectric with multiple spatially dispersive resonances in the susceptibility. The effect of the boundary is described by an arbitrary reflection coefficient for polarization waves in the material at the surface, with specific values corresponding to various additional boundary conditions (ABCs) for Maxwell's equations. We derive exact expressions for the electromagnetic reflection and transmission coefficients and present the results for a variety of materials with multiple exciton bands. We find an improved single-band approximation for heavy/light exciton bands and extend our model to exciton dispersion relations with linear $k$ terms which occur in uniaxial crystals. Finally, we calculate the spectral energy density of thermal and zero-point radiation for a variety of multi-resonance models and ABCs. Comment: 13 pages, 12 figures |
| Databáze: | OpenAIRE |
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