Optical gain in nanocrystalline silicon: comparison of planar waveguide geometry with a non-waveguiding ensemble of nanocrystals
Luterova, K; Cazzaneli, M; Likforman, J-P; Navarro, D; Valenta, Jan; Ostatnicky, T; Dohnalova, K; Cheylan, S; Gilliot, P; Honerlage, B; Pavesi, L; Pelant, I
Stimulated emission from nanocrystalline silicon in the visible has become a hot topic during the past years. Various forms of silicon nanostructures are being exploited, among them planar optical waveguides made of silicon nanocrystals, silicon superlattices and tiny silicon nanoparticles. We report on optical gain measurements using the variable-stripe-length and the shifting-excitation-spot methods in two different types of nanocrystalline samples: a planar nanocrystalline waveguide prepared...[Show more]
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