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Modified spontaneou...
Modified spontaneous emission of silicon nanocrystals embedded in artificial opals
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Janda, Petr (författare)
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Valenta, Jan (författare)
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Rehspringer, Jean-Luc (författare)
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Mafouana, Rodrigue R. (författare)
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- Linnros, Jan (författare)
- KTH,Mikroelektronik och Informationsteknik, IMIT
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Elliman, Robert G. (författare)
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(creator_code:org_t)
- 2007-09-21
- 2007
- Engelska.
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Ingår i: Journal of Physics D. - : IOP Publishing. - 0022-3727 .- 1361-6463. ; 40:19, s. 5847-5853
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Si nanocrystals (NCs) were embedded in synthetic silica opals by means of Si-ion implantation or opal impregnation with porous-Si suspensions. In both types of sample photoluminescence (PL) is strongly Bragg-reflection attenuated (up to 75%) at the frequency of the opal stop-band in a direction perpendicular to the ( 1 1 1) face of the perfect hcp opal structure. Time-resolved PL shows a rich distribution of decay rates, which contains both shorter and longer decay components compared with the ordinary stretched exponential decay of Si NCs. This effect reflects changes in the spontaneous emission rate of Si NCs due to variations in the local density of states of real opal containing defects.
Nyckelord
- photonic crystals
- quantum dots
- photoluminescence
- spectroscopy
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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