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28 August 2008 Controlled thermal emission of two-color polarized infrared light from arrayed plasmon nanocavities
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We have developed thermal emitters of linearly polarized and narrow-band mid-infrared light based on highly controlled plasmon resonance in narrow and deep rectangular Au gratings. This optical source is a series of one-dimensional metal-insulator-metal optical cavities with a closed end. This characteristic results in the control of the thermal radiation, emitting a narrow infrared spectrum at a specific wavelength of 2.5-5.5 micro-meters. The wavelength is specified 100nm wide, 1000nm deep dimensions of the cavity were accurately manufactured. The maximum emittance reaches 0.90, and the FWHM/wavelength of the peak is as narrow as 0.13-0.23. Furthermore, we have demonstrated simple chemical analysis based on orthogonally polarized two-color infrared waves emitted from an integrated grating. This simple emitter is expected to play a key role in the infrared sensing technologies for analyzing our environment.
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K. Ikeda, H. T. Miyazaki, T. Kasaya, K. Yamamoto, Y. Inoue, K. Fujimura, and T. Kanakugi "Controlled thermal emission of two-color polarized infrared light from arrayed plasmon nanocavities", Proc. SPIE 7033, Plasmonics: Nanoimaging, Nanofabrication, and Their Applications IV, 70331N (28 August 2008);


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