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二维安德森局域化随机介质中的非普适强度关联。

Nonuniversal intensity correlations in a two-dimensional Anderson-localizing random medium.

机构信息

Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen, Denmark.

出版信息

Phys Rev Lett. 2012 Dec 21;109(25):253902. doi: 10.1103/PhysRevLett.109.253902. Epub 2012 Dec 19.

Abstract

Complex dielectric media often appear opaque because light traveling through them is scattered multiple times. Although the light scattering is a random process, different paths through the medium can be correlated encoding information about the medium. Here, we present spectroscopic measurements of nonuniversal intensity correlations that emerge when embedding quantum emitters inside a disordered photonic crystal that is found to Anderson-localize light. The emitters probe in situ the microscopic details of the medium, and imprint such near-field properties onto the far-field correlations. Our findings provide new ways of enhancing light-matter interaction for quantum electrodynamics and energy harvesting, and may find applications in subwavelength diffuse-wave spectroscopy for biophotonics.

摘要

复杂的介电介质通常表现为不透明,因为光在其中传播时会多次散射。尽管光散射是一个随机过程,但通过介质的不同路径可以相关编码有关介质的信息。在这里,我们介绍了在无序光子晶体中嵌入量子发射器时出现的非普遍强度相关的光谱测量结果,该光子晶体被发现可以安德森局域化光。发射器原位探测介质的微观细节,并将这种近场特性印刻在远场相关上。我们的发现为量子电动力学和能量收集提供了增强光物质相互作用的新方法,并可能在生物光子学的亚波长漫射波光谱学中得到应用。

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