Tailoring light-matter coupling in semiconductor and hybrid-plasmonic nanowires.
Tailoring light-matter coupling in semiconductor and hybrid-plasmonic nanowires.
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DOI：
10.1088/0034-4885/77/8/086401
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发表时间：
2014-08
期刊：
影响因子：
--
通讯作者：
Agarwal R
中科院分区：
文献类型：
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作者：
Piccione B;Aspetti CO;Cho CH;Agarwal R
理解光和物质之间的相互作用是许多领域的核心，为物质的本质提供了宝贵的见解。光-物质耦合本身的更好理解允许创建定制的应用程序，从而产生各种设备，如激光器，开关，传感器，调制器和探测器。光学模式体积的减少对于增强光-物质耦合强度是至关重要的，并且在固态系统中，自组装半导体和混合等离子体纳米线适合于产生高度受限的光学模式。在开发了针对纳米线形态设计的独特光谱技术之后，最近已经定制了精心设计的半导体纳米线腔，以先前在光学微腔中看到的方式来增强光-物质耦合强度。定制的混合等离子体纳米线中更小的模式体积最近允许类似的突破，导致亚皮秒激发态寿命和异常高的辐射率增强。在这里，我们回顾了半导体和混合等离子体单片纳米线光学腔中的光-物质相互作用的文献，以突出最近在定制光-物质耦合强度方面取得的进展。从光学物理学的相关概念的讨论开始，我们将讨论我们的光-物质耦合的知识是如何随着我们产生不断缩小的光学模体积的能力而发展的，将焦点从块状材料转移到光学微腔，然后再转移到最近从半导体纳米线获得的结果。
Understanding interactions between light and matter is central to many fields, providing invaluable insights into the nature of matter. In its own right, a greater understanding of light-matter coupling has allowed for the creation of tailored applications, resulting in a variety of devices such as lasers, switches, sensors, modulators, and detectors. Reduction of optical mode volume is crucial to enhancing light-matter coupling strength, and among solid-state systems, self-assembled semiconductor and hybrid-plasmonic nanowires are amenable to creation of highly-confined optical modes. Following development of unique spectroscopic techniques designed for the nanowire morphology, carefully engineered semiconductor nanowire cavities have recently been tailored to enhance light-matter coupling strength in a manner previously seen in optical microcavities. Much smaller mode volumes in tailored hybrid-plasmonic nanowires have recently allowed for similar breakthroughs, resulting in sub-picosecond excited-state lifetimes and exceptionally high radiative rate enhancement. Here, we review literature on light-matter interactions in semiconductor and hybrid-plasmonic monolithic nanowire optical cavities to highlight recent progress made in tailoring light-matter coupling strengths. Beginning with a discussion of relevant concepts from optical physics, we will discuss how our knowledge of light-matter coupling has evolved with our ability to produce ever-shrinking optical mode volumes, shifting focus from bulk materials to optical microcavities, before moving on to recent results obtained from semiconducting nanowires.