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Appl. Phys. Lett. 92, 021117 (2008); http://dx.doi.org/10.1063/1.2834903 (3 pages)

Controlled thermal emission of polarized infrared waves from arrayed plasmon nanocavities

K. Ikeda1, H. T. Miyazaki2, T. Kasaya3, K. Yamamoto1, Y. Inoue1, K. Fujimura1, T. Kanakugi1, M. Okada1, K. Hatade1, and S. Kitagawa1

1Nalux Co., Ltd., 2-1-7 Yamazaki, Shimamoto-cho, Mishima-gun, Osaka 618-0001, Japan
2Quantum Dot Research Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
3Nanotechnology Innovation Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan

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(Received 10 December 2007; accepted 23 December 2007; published online 16 January 2008)

We have demonstrated thermal emission of linearly polarized and narrow-band midinfrared waves from subwavelength gratings of narrow and deep rectangular cavities engraved on a Au surface. 100-nm-wide and 1000-nm-deep, high-aspect trenches were accurately manufactured by inversion from master molds. Organ pipe resonance of surface plasmons in the cavities exhibits a Lorentzian emission peak centered at 2.5–5.5 μm. The maximum emittance reaches 0.90 and the peak width Δλ/λ is as narrow as 0.13–0.23. This simple emitter is expected to play a key role in the infrared sensing technologies for analyzing our environment.

© 2008 American Institute of Physics

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KEYWORDS and PACS

PACS

  • 73.20.Mf

    Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)

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ISSN

0003-6951 (print)  
1077-3118 (online)

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