Circularly polarized emission from colloidal nanocrystal quantum dots confined in microcavities formed by chiral mirrors

Fan Zhang, Jian Xu, Akhlesh Lakhtakia, Sean M. Pursel, Mark William Horn, Andrew Wang

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Colloidal semiconductor nanocrystal quantum dots (NQDs) confined in a microcavity device emit resonance-enhanced, circularly polarized (CP) light, when the device consists of a pair of chiral sculptured-thin-film mirrors separated by layers of emissive nanocrystals and spacers that form a λ2 -resonant cavity. The resonant emission from the NQDs within the microcavity is strongly directed normally to the mirror surfaces. It is speculated that the enhanced coupling between the NQD excitons and the confined electromagnetic field resulted in the observed CP emission from the embedded NQDs with significant improvements in the light output's directionality and color purity.

Original languageEnglish (US)
Article number023102
JournalApplied Physics Letters
Volume91
Issue number2
DOIs
StatePublished - Aug 1 2007

Fingerprint

nanocrystals
quantum dots
mirrors
cavity resonators
spacers
polarized light
electromagnetic fields
purity
excitons
color
output
thin films

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "Colloidal semiconductor nanocrystal quantum dots (NQDs) confined in a microcavity device emit resonance-enhanced, circularly polarized (CP) light, when the device consists of a pair of chiral sculptured-thin-film mirrors separated by layers of emissive nanocrystals and spacers that form a λ2 -resonant cavity. The resonant emission from the NQDs within the microcavity is strongly directed normally to the mirror surfaces. It is speculated that the enhanced coupling between the NQD excitons and the confined electromagnetic field resulted in the observed CP emission from the embedded NQDs with significant improvements in the light output's directionality and color purity.",
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Circularly polarized emission from colloidal nanocrystal quantum dots confined in microcavities formed by chiral mirrors. / Zhang, Fan; Xu, Jian; Lakhtakia, Akhlesh; Pursel, Sean M.; Horn, Mark William; Wang, Andrew.

In: Applied Physics Letters, Vol. 91, No. 2, 023102, 01.08.2007.

Research output: Contribution to journalArticle

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T1 - Circularly polarized emission from colloidal nanocrystal quantum dots confined in microcavities formed by chiral mirrors

AU - Zhang, Fan

AU - Xu, Jian

AU - Lakhtakia, Akhlesh

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AU - Horn, Mark William

AU - Wang, Andrew

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AB - Colloidal semiconductor nanocrystal quantum dots (NQDs) confined in a microcavity device emit resonance-enhanced, circularly polarized (CP) light, when the device consists of a pair of chiral sculptured-thin-film mirrors separated by layers of emissive nanocrystals and spacers that form a λ2 -resonant cavity. The resonant emission from the NQDs within the microcavity is strongly directed normally to the mirror surfaces. It is speculated that the enhanced coupling between the NQD excitons and the confined electromagnetic field resulted in the observed CP emission from the embedded NQDs with significant improvements in the light output's directionality and color purity.

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