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Slowdown of light d...
Slowdown of light due to exciton-polariton propagation in ZnO
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- Chen, Shula (författare)
- Linköpings universitet,Funktionella elektroniska material,Tekniska fakulteten
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- Chen, Weimin (författare)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Buyanova, Irina (författare)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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(creator_code:org_t)
- American Physical Society, 2011
- 2011
- Engelska.
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Ingår i: Physical Review B. Condensed Matter and Materials Physics. - : American Physical Society. - 1098-0121 .- 1550-235X. ; 83:24, s. 245212-
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- By employing time-of-flight spectroscopy, the group velocity of light propagating through bulk ZnO is demonstrated to dramatically decrease down to 2044 km/s when photon energy approaches the absorption edge of the material. The magnitude of this decrease is found to depend on light polarization. It is concluded that even though the slowdown is observed in the vicinity of donor bound exciton (BX) resonances, the effect is chiefly governed by dispersion of free exciton (FX) polaritons that propagate coherently via ballistic transport. Based on the experimentally determined spectral dependence of the polariton group velocity, the polariton dispersion is accurately determined.
Nyckelord
- TECHNOLOGY
- TEKNIKVETENSKAP
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