Spaser in plasmonic nano-antenna evaluated by an analytical theory
文献类型：期刊论文
| 作者 | Zhong, XL ; Hong, MH ; Li, ZY |
| 刊名 | APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
 |
| 出版日期 | 2014 |
| 卷号 | 115期号:1页码:5 |
| ISSN号 | 0947-8396 |
| 通讯作者 | Li, ZY (reprint author), Chinese Acad Sci, Inst Phys, Lab Opt Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | Surface plasmon amplification by the stimulated emission of radiation (spaser) in plasmonic nanocavities as a novel concept has quickly advanced in recent years. Understanding the nature and mechanism of the spaser system is important for both fundamental studies and the development of new applications. We theoretically investigate the spaser made from a plasmonic nano-antenna embedded with active gain media by using an analytical semiclassical theory. It incorporates the four-level atomic rate equations in association with the classical oscillator model for active materials and Maxwell's equations for fields. The nano-antenna cavity has a large Purcell factor and low absorption loss which is beneficial for the realization of low-threshold spaser. We use the theory to uncover all the characteristics of this nanocavity spaser system, including the enhancement of the local electric field, gain, saturation phenomenon and lasing threshold. It is found that an important quantity named the cavity loss coupling strength coefficient can be explored to provide a new way to design the nanocavity precisely to reduce the absorption power density and enhance the spaser output power density simultaneously. The theory can be commonly used in understanding and designing various micro/nanolaser and spaser systems. |
| 资助信息 | 973 Program of China [2011CB922002, 2013CB632704]; Knowledge Innovation Program of the Chinese Academy of Sciences [Y1V2013L11] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59861]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zhong, XL,Hong, MH,Li, ZY. Spaser in plasmonic nano-antenna evaluated by an analytical theory[J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING,2014,115(1):5. |
| APA | Zhong, XL,Hong, MH,&Li, ZY.(2014).Spaser in plasmonic nano-antenna evaluated by an analytical theory.APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING,115(1),5. |
| MLA | Zhong, XL,et al."Spaser in plasmonic nano-antenna evaluated by an analytical theory".APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING 115.1(2014):5. |
入库方式： OAI收割
来源：物理研究所
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