Light Emission of Single Emitters in 3-dimensional Photonic Crystals

3 维光子晶体中单个发射器的发光

基本信息

批准号：
24778895
负责人：
Professor Dr. Frank Cichos
金额：
--
依托单位：
Peter-Debye-Institut für Physik der weichen Materie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2006
资助国家：
德国
起止时间：
2005-12-31 至 2012-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/24778895?language=en
关键词：
Light Emission Single Emitters dimensional

项目摘要

One of the distinct properties of photonic crystals is their influence on the photoluminescence of embedded emitters. Photonic crystals can enhance or inhibit spontaneous emission due to a modification of the vacuum fluctuations of the electromagnetic field. They can redistribute emitted photons spatially and spectrally due to an anisotropic light propagation inside the photonic crystal. However, all of these properties depend on the local position of the emitter inside the photonic crystal and further its emission wavelength. Measurements on ensembles of emitters mix all these local effects, average over large spectral regions and therefore make a detailed investigation of the photonic crystal complicated. The novel experimental approach of this project is to remove the ensemble average and to probe the local density of states in a photonic crystal with single quantum dots just at one specific site and in a narrow frequency region. For this purpose defocused wide-field fluorescence microscopy will be employed to study the anisotropic light propagation in photonic crystals be means of single point like emitters. This will allow for the first time a spatially and frequency selective study of the variation of the local density of states in a photonic crystal and is further a direct step to control the emission of single photon sources with the help of 3-dimensional photonic crystals.

光子晶体的不同特性之一是它们对嵌入发射器的光致发光的影响。光子晶体可以增强或抑制由于电磁场的真空波动的修饰，因此可以增强或抑制自发发射。由于光子晶体内部的各向异性光传播，它们可以在空间和光谱上重新分布发射光子。但是，所有这些特性都取决于发射器在光子晶体内的局部位置以及进一步的发射波长。对发射器的集合的测量混合了所有这些局部效应，平均在大光谱区域，因此对光子晶体复杂进行了详细的研究。该项目的新型实验方法是消除整体平均值，并探测光子晶体中具有单个量子点的局部密度，仅在一个特定位点和狭窄的频率区域。为此，将采用散热性的宽视野荧光显微镜研究光子晶体中的各向异性光传播是像发射器这样的单点的手段。这将首次允许对光子晶体中状态局部密度变化的空间和频率选择性研究，这是控制单光子源在3维光子晶体的帮助下的直接步骤。