Abstract

The coupling of excited surface polaritons with thermal radiation through diffraction by gratings results in coherent thermal emission in a certain frequency range toward well-defined directions for p polarization. A planar coherent source is proposed that uses multilayers of negative permittivity (ϵ) and negative permeability (μ) materials. Owing to the excitation of surface polaritons at the interface between the negative-ϵ and negative-μ layers, coherent emission can be achieved for both s and p polarization. Moreover, one can control the emission frequency and direction by adjusting the layer thicknesses.

© 2005 Optical Society of America

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