Optical dynamics in crystal slabs: crossover from superradiant excitons to bulk polaritons

Jasper Knoester

doi:10.1103/PhysRevLett.68.654

Optical dynamics in crystal slabs: crossover from superradiant excitons to bulk polaritons

Jasper Knoester

Zernike Institute for Advanced Materials

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Abstract

The radiative-excited-state dynamics in crystal slabs is studied as a function of the slab thickness L. A general dispersion relation is derived that interpolates between the superradiant-exciton regime at thicknesses small compared to an optical wavelength lambda and bulk polaritons in thick crystals. It is shown that previous results predicting superradiance in thick slabs (L much greater than lambda) arise from invalid pole approximations.

Original language	English
Pages (from-to)	654-657
Number of pages	4
Journal	Physical Review Letters
Volume	68
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.68.654
Publication status	Published - 3-Feb-1992

Keywords

RADIATIVE DECAY

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10.1103/PhysRevLett.68.654

1992PhysRevLettKnoester.pdfFinal publisher's version, 616 KB

Cite this

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title = "Optical dynamics in crystal slabs: crossover from superradiant excitons to bulk polaritons",

abstract = "The radiative-excited-state dynamics in crystal slabs is studied as a function of the slab thickness L. A general dispersion relation is derived that interpolates between the superradiant-exciton regime at thicknesses small compared to an optical wavelength lambda and bulk polaritons in thick crystals. It is shown that previous results predicting superradiance in thick slabs (L much greater than lambda) arise from invalid pole approximations.",

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AB - The radiative-excited-state dynamics in crystal slabs is studied as a function of the slab thickness L. A general dispersion relation is derived that interpolates between the superradiant-exciton regime at thicknesses small compared to an optical wavelength lambda and bulk polaritons in thick crystals. It is shown that previous results predicting superradiance in thick slabs (L much greater than lambda) arise from invalid pole approximations.

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