Abstract
The wave nature and diffraction of light pose a significant bottleneck to the continued performance and efficiency scaling of a wide variety of integrated photonic devices, often necessitating solutions based on resonance, slow-light, or plasmonics to derive enhanced light-matter interaction. Here, we introduce all-dielectric waveguides that exploit the vectorial nature of light to achieve strong subdiffraction confinement in high index dielectrics, enabling characteristic mode dimensions below $\lambda _0^2/1000$ without metals or plasmonics. We further show how these ultra-small mode areas may coincide or diverge from the nonlinear effective mode area. The work opens the door to new types of waveguide-based devices featuring strong near-field confinement, Purcell factors, and nonlinear effects, with broad applications spanning classical and quantum optics.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
Yaotian Zhao, Xuhan Guo, Yong Zhang, Jinlong Xiang, Kangnian Wang, Hongwei Wang, and Yikai Su
Opt. Lett. 45(13) 3797-3800 (2020)
Yueguang Zhou, Yujing Wang, Kresten Yvind, Niels Gregersen, and Minhao Pu
Opt. Express 32(2) 2884-2893 (2024)
Yoav Chachamovitz and Guy Bartal
Opt. Lett. 45(17) 4871-4874 (2020)