Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5443038 | Optical Materials | 2016 | 6 Pages |
Abstract
We demonstrate the unity absorption of visible light with an ultra-narrow 0.1Â nm linewidth. It arises from the Bloch surface wave resonance in alternating TiO2/SiO2 multilayers. The total absorption and narrow linewidth are explained from the radiative and absorptive damping, which are quantitatively determined by the temporal coupled mode theory. When a silver film with proper thickness is added to the absorber, the perfect absorption is achieved with only 3 structural bilayers, in contrast with 8 bilayers required without Ag. Furthermore, significant field enhancement and an ultrahigh 2600/RIU sensing figure-of-merit are simultaneously obtained at resonance, which might facilitate applications in nonlinear optical devices and high resolution refractive index sensing.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Jiawei Cong, Wenxing Liu, Zhiqiang Zhou, Naifei Ren, Guilin Ding, Mingyang Chen, Hongbing Yao,