Ground State Electroluminescence
Ground State Electroluminescence
复制标题
DOI：
10.1103/physrevlett.116.113601
复制
发表时间：
2016-03-17
影响因子：
8.6
通讯作者：
Nori, Franco
中科院分区：
文献类型：
--
作者：
Cirio, Mauro;De Liberato, Simone;Nori, Franco
电致发光，即在电流存在下的光发射，提供关于给定系统的允许电子跃迁的信息。它通常用于研究强耦合光-物质系统的物理，其本征频率通过与腔的光子场的强耦合而分裂。在这里，我们表明，与通常的电致发光一起，当电流流经超强光物质耦合体系时，系统会发射出独特的量子辐射。虽然标准电致发光依赖于激发态的布居，然后是自发发射，但我们在本文中描述的过程从修饰的基态提取束缚光子，并且它具有明确区分其与通常电致发光的独特特征。
Electroluminescence, the emission of light in the presence of an electric current, provides information on the allowed electronic transitions of a given system. It is commonly used to investigate the physics of strongly coupled light-matter systems, whose eigenfrequencies are split by the strong coupling with the photonic field of a cavity. Here we show that, together with the usual electroluminescence, systems in the ultrastrong light-matter coupling regime emit a uniquely quantum radiation when a flow of current is driven through them. While standard electroluminescence relies on the population of excited states followed by spontaneous emission, the process we describe herein extracts bound photons from the dressed ground state and it has peculiar features that unequivocally distinguish it from usual electroluminescence.