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Blue shift of spontaneous emission in hyperbolic metamaterial.
Gu, Lei; Tumkur, T U; Zhu, G; Noginov, M A.
Afiliação
  • Gu L; Center for Materials Research, Norfolk State University, Norfolk, VA, 23504, USA.
  • Tumkur TU; Center for Materials Research, Norfolk State University, Norfolk, VA, 23504, USA.
  • Zhu G; Center for Materials Research, Norfolk State University, Norfolk, VA, 23504, USA.
  • Noginov MA; Center for Materials Research, Norfolk State University, Norfolk, VA, 23504, USA.
Sci Rep ; 4: 4969, 2014 Jun 24.
Article em En | MEDLINE | ID: mdl-24957679
Spontaneous emission is one of the most fundamental quantum phenomena in optics. Following the seminal work of Purcell and in agreement with the Fermi's Golden Rule, its rate can be controlled with the photonic density of states (PDOS). In recent years, this effect has been demonstrated in metamaterials with hyperbolic dispersion--highly anisotropic composite materials, which have a broad-band singularity of the density of photonic states. At this time, we show that hyperbolic metamaterials can control spontaneous emission spectra as well. Experimentally, DCM laser dye has been embedded into lamellar metal/dielectric metamaterial. The observed 18 nm blue shift of emission is explained by strong dispersion of the density of photonic states. On the other hand, practically no spectral shift has been observed in the excitation spectra of the same dye. This suggests that the effect of PDOS on spontaneous emission is very different from its effect on excitation and absorption.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2014 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2014 Tipo de documento: Article