Abstract
Fabry–Perot (FP)-like resonances have been widely described in nanoantennas. In the original FP resonator, a third mirror can be added, resulting in a multimirror interferometer. However, in the case of a combination of nanoantennas, it has been reported that each cavity behaves independently. Here, we evidence the interferences between two FP absorbing nanoantennas through a common mirror, which has a strong impact on the optical behavior. While the resonance wavelength is only slightly shifted, the level of absorption reaches nearly 100%. Moreover, the quality factor increases up to factor 7 and can be chosen by geometric design over a range from 11 to 75. We demonstrate, thanks to a simple analytical model, that this coupling can be ascribed to a double FP cavity resonance, with the unique feature that each cavity is separately coupled to the outer medium.
© 2017 Optical Society of America
Full Article | PDF ArticleMore Like This
Xinpu Zhang, Liyang Shao, Xihua Zou, Bin Luo, Wei Pan, and Lianshan Yan
Opt. Lett. 42(17) 3474-3477 (2017)
Mohammad Amin Tadayon, Martha-Elizabeth Baylor, and Shai Ashkenazi
Opt. Express 22(5) 5904-5912 (2014)
Tomasz Matthia, Baptiste Fix, Léna Soun, Christophe Dupuis, Nathalie Bardou, and Patrick Bouchon
Opt. Lett. 47(17) 4415-4418 (2022)