Extraordinary emission from two-dimensional plasmonic-photonic crystals
J. Appl. Phys. 98, 013531 (2005); doi:10.1063/1.1947899
Published 11 July 2005
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A metallodielectric architecture is employed to readily tailor the spectral properties of a bulk material for application to infrared sources and spectroscopic sensors. We exploit the interaction between surface plasmons at a metal interface with a photonic crystal in silicon to control the spectral response of the surface in reflection, absorption, and emission. The design uses Si-based thermally isolated suspended bridge structures fabricated using conventional photolithography techniques. The tunable narrow spectral response is defined by the symmetry and periodicity of the metallodielectric photonic crystal. Individual subresonances are recognized within this bandwidth. We model their origin through calculations of surface-plasmon modes in the metallic grating overlayer. Periodic arrays of holes in thin metal layers lead to coupled plasmons at the two metaldielectric interfaces that, in turn, couple to modes in the underlying siliconair photonic crystal. The model provides crucial physical insight into the interaction between surface plasmons and photonic crystals, with good agreement with the experimental results.
©2005 American Institute of Physics
| History: | Received 1 February 2005; accepted 12 May 2005; published 11 July 2005 |
| Permalink: |
http://link.aip.org/link/?JAPIAU/98/013531/1 |
KEYWORDS and PACS
silicon,
elemental semiconductors,
metallic thin films,
dielectric materials,
photonic crystals,
photolithography,
infrared spectra,
Fourier transform spectra,
semiconductor-metal boundaries,
surface plasmons
- 42.70.Qs
Photonic bandgap materials - 73.20.Mf
Collective excitations (surface/interface states) including excitons, polarons, plasmons and other charge-density excitations - 78.66.Bz
Optical properties of metals and metallic alloys (thin films) - 78.30.Er
Infrared and Raman spectra in solid metals and alloys - YEAR: 2005
RELATED DATABASES
PUBLICATION DATA
0021-8979 (print)
1089-7550 (online)
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