Structure-related optical properties of luminescent hetero-opals

被引：34

作者：

Gaponik, N ^{[1
]}

Eychmüller, A

Rogach, AL

Solovyev, VG

Torres, CMS

Romanov, SG

机构：

[1] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany

[2] Univ Munich, Dept Phys, Photon & Optoelect Grp, D-80799 Munich, Germany

[3] Univ Munich, Ctr Nanosci, D-80799 Munich, Germany

[4] Univ Wuppertal, Dept Elect & Informat Engn, D-42097 Wuppertal, Germany

[5] Univ Wuppertal, Inst Mat Sci, D-42097 Wuppertal, Germany

来源：

JOURNAL OF APPLIED PHYSICS | 2004年 / 95卷 / 03期

关键词：

D O I：

10.1063/1.1637135

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Light-emitting hetero-opals have been synthesized by successive crystallization of one thin opal film on top of the other from beads of two different diameters and selective impregnation of one of films with luminescent CdTe nanocrystals. A strong spectral and spatial anisotropy of the reflectance and the photoluminescence spectra has been observed and attributed to the photonic bandgap mismatch in opal films. Changes of the emission anisotropy with excitation power have been associated with the stimulation of CdTe nanocrystal emission in a host opal film. An interface-related transmission minimum has been revealed and tentatively explained as the consequence of the distractive interference of optical modes of hetero-opal constituents. The idea of the interface resonance has been supported by the observation of the emission modification in this frequency range. (C) 2004 American Institute of Physics.

引用

页码：1029 / 1035

页数：7

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