期刊名称：Journal and Proceedings of the Royal Society of New South Wales
印刷版ISSN：0035-9173
出版年度：2014
卷号：147
期号：1
页码：55-63
语种：English
出版社：The Society
摘要：An alternative approach to study light-matter interactions in nano-photonics is presented. This method is based on considering light and sample as a whole system and exploiting their symmetries. The mathematical formalism to systematically study symmetries of light beams is explained and particularly applied to vortex beams. Then, the method is used in two different problems. First, it is shown that vortex beams can be used to effectively turn any dielectric sphere into a dual material. Then, it is seen that the same light beams can be used to excite whispering gallery modes on free space, thus avoiding the evanescent coupling typically used in these kinds of problems.
