Toward stimulated interaction of surface phonon polaritons

Journal Article · Sat Dec 21 04:00:00 EST 2013 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4851717· OSTI ID:22266105

Kong, B. D.; Trew, R. J.

Thermal emission spectra mediated by surface phonon polariton are examined by using a theoretical model that accounts for generation processes. Specifically, the acoustic phonon fusion mechanism is introduced to remedy theoretical deficiencies of the near thermal equilibrium treatments. The model clarifies the thermal excitation mechanism of surface phonon polaritons and the energy transfer path under non-zero energy flow. When applied to GaAs and SiC semi-infinite surfaces, the nonequilibrium model predicts that the temperature dependence of the quasi-monochromatic peak can exhibit distinctly different characteristics of either sharp increase or slow saturation depending on the materials, which is in direct contrast with the estimate made by the near-equilibrium model. The proposed theoretical tool can accurately analyze the nonequilibrium steady states, potentially paving a pathway to demonstrate stimulated interaction/emission of thermally excited surface phonon polaritons.

• OSTI ID: 22266105
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 23 Vol. 114; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EMISSION
EMISSION SPECTRA
ENERGY TRANSFER
EXCITATION
GALLIUM ARSENIDES
INTERACTIONS
MONOCHROMATIC RADIATION
PHONONS
POLARONS
SILICON CARBIDES
STEADY-STATE CONDITIONS
TEMPERATURE DEPENDENCE
THERMAL EQUILIBRIUM