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Spectral Investigation of a 2-Dimensional Photonic Crystal Slab for mid-Infrared Radiation

Hagen, R.A.J. (2007) Spectral Investigation of a 2-Dimensional Photonic Crystal Slab for mid-Infrared Radiation.

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Abstract:This thesis presents spectral investigations of a two-dimensional (2D) photonic crystal (PhC) which has an exceptional large surface (100mm2). The 2D PhC investigated is made from Silicon and was available for fabrication with a novel Laser Interference Lithography (LIL) technique, where the main design purpose was to provide a modified dispersion for photon energies of less than half of the electronic band gap of silicon. Here we present by angular dependent infrared reflectivity and transmission spectra of these crystals as obtained in experiments. Resonance features are observed in polarized reflectivity and transmission spectra in the near and mid-infrared, which arise from coupling of radiation to PhC leaky modes. We determine the quality factor of the experimentally observed features and comparing them with upper limit as calculated for the modes supported by our structure. This comparison provides the first information on the crystal quality obtained by the named LIL fabrication.
Item Type:Essay (Master)
Faculty:TNW: Science and Technology
Subject:33 physics
Programme:Applied Physics MSc (60436)
Link to this item:http://purl.utwente.nl/essays/645
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