包覆纳米粒子激光的设计与模拟性能
摘要
研究了一种由(有源)三能级增益介质核和外围等离子体金属壳组成的同心纳米级球形壳层的光学性质。当前光学超材料研究表明，在纳米包覆球粒子中包含无损耗等离子体材料以实现负介电常数，可带来共振散射以及透明或隐身等新颖光学性质。然而实践中等离子体材料在光频下具有高损耗。观察到引入有源材料后可克服等离子体壳层内的本征吸收，并在这些包覆纳米球形壳层粒子的散射与吸收截面中观察到新光学性质。此外，观测到一种“超”共振，其幅度大于调谐的被动纳米包覆球形壳层的共振幅度。该观察提示了实现高度亚波长激光的可能，其尺寸比传统半波长腔长判据小一个量级以上。对不同构型的该包覆纳米粒子(CNP)激光的工作特性进行了数值获取。
引用
@article{arxiv.physics/0612192,
title = {The Design and Simulated Performance of a Coated Nano-Particle Laser},
author = {Joshua A. Gordon and Richard W. Ziolkowski},
journal= {arXiv preprint arXiv:physics/0612192},
year = {2009}
}
备注
35 pages. Revision submitted to Optics Express, Feb 15, 2007. This replacement is intended to clarify the work presented in the previous version of this paper. In particular, the definitions and parameters associated with the permittivity that was used to include the three level gain model used in the simulation results presented. The authors also made changes to some of the wording used in the text for better clarity. The results presented in this version are identical to those of the previous version