Broadband long-wavelength infrared Si/SiO sub(2) subwavelength grating reflector

Broadband long-wavelength infrared Si/SiO sub(2) subwavelength grating reflector

A long-wavelength IR broadband reflector is demonstrated using a high-index-contrast subwavelength grating based on a Si/SiO2 system. The field response has been computationally and experimentally verified to exhibit broadband reflectance in the spectral range of 13-16 mu m with Delta lambda / lambd...

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Veröffentlicht in:Optics letters 2012-05, Vol.37 (9), p.1523-1525
Hauptverfasser: Foley, J M, Itsuno, A M, Das, T, Velicu, S, Phillips, J D
Format: Artikel
Sprache:eng
Schlagworte:
Broadband
Diffraction gratings
Gratings (spectra)
Reflectance
Reflectivity
Reflectors
Silicon
Silicon dioxide
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Zusammenfassung:A long-wavelength IR broadband reflector is demonstrated using a high-index-contrast subwavelength grating based on a Si/SiO2 system. The field response has been computationally and experimentally verified to exhibit broadband reflectance in the spectral range of 13-16 mu m with Delta lambda / lambda =18.5% for reflectance >70%. The gratings exhibit incident field polarization dependence with an average extinction ratio of 1:1.6.
ISSN:0146-9592