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Resonant light delay in GaN with ballistic and diffusive propagation
Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia.
Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia.
Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia.
UBP, CNRS, UMR 6602, LASMEA, F-63177 Clermont Ferrand, France.
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2008 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 100, no 8Article in journal (Refereed) Published
Abstract [en]

We report on a strong delay in light propagation through bulk GaN, detected by time-of-flight spectroscopy. The delay increases resonantly as the photon energy approaches the energy of a neutral-donor bound exciton (BX), resulting in a velocity of light as low as 2100 km/s. In the close vicinity of the BX resonance, the transmitted light contains both ballistic and diffusive components. This phenomenon is quantitatively explained in terms of optical dispersion in a medium where resonant light scattering by the BX resonance takes place in addition to the polariton propagation.

Place, publisher, year, edition, pages
2008. Vol. 100, no 8
National Category
Engineering and Technology
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URN: urn:nbn:se:liu:diva-45904DOI: 10.1103/PhysRevLett.100.087402OAI: oai:DiVA.org:liu-45904DiVA: diva2:266800
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13

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Shubina, TatianaBergman, PederPozina, GaliaMonemar, Bo

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