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Silicon nanocrystals, photonic structures and optical gain

Abstract : Silicon nanocrystals (SiNCs) of sizes below approximately 5 nm are a material with an efficient room-temperature photoluminescence (PL) and optical gain. Optical gain is a prerequisite for obtaining stimulated emission from a pumped material, and the achievement of stimulated emission (and lasing) from Si-based nanostructures is of particular interest in the field of silicon photonics. The aim of this work was (i) to investigate fundamental optical properties of SiNCs, (ii) to design and prepare a photonic crystal with enhanced light extraction efficiency and (iii) to explore a possibility of enhancing optical gain of light-emitting SiNCs by combining them with a two-dimensional photonic crystal.
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Lukáš Ondič. Silicon nanocrystals, photonic structures and optical gain. Other [cond-mat.other]. Université de Strasbourg, 2014. English. ⟨NNT : 2014STRAE004⟩. ⟨tel-01124291⟩

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