Abstract

We demonstrate the existence of a critical behavior of a single electromagnetic mode propagating in a tapered dielectric structure. This behavior is described in terms of a critical phase velocity in the case of an adiabatic tapering. In the vicinity of this critical phase velocity, the tapered structure no longer confines the radiation and a significant fraction of the power escapes transversely.

© 2017 Optical Society of America

Iridescence-free and narrowband perfect light absorption in critically coupled metal high-index dielectric cavities

M. ElKabbash, E. Ilker, T. Letsou, N. Hoffman, A. Yaney, M. Hinczewski, and G. Strangi
Opt. Lett. 42(18) 3598-3601 (2017)

Plasmon mediated inverse Faraday effect in a graphene–dielectric–metal structure

Igor V. Bychkov, Dmitry A. Kuzmin, Valentine A. Tolkachev, Pavel S. Plaksin, and Vladimir G. Shavrov
Opt. Lett. 43(1) 26-29 (2018)

Enhanced Fano resonance in a non-adiabatic tapered fiber coupled with a microresonator

Kun Zhang, Yue Wang, and Yi-Hui Wu
Opt. Lett. 42(15) 2956-2959 (2017)

Subwavelength grating microlens with taper-resistant characteristics

Mao Ye and Ya Sha Yi
Opt. Lett. 42(6) 1031-1034 (2017)

High-efficiency broadband excitation and propagation of second-mode spoof surface plasmon polaritons by a complementary structure

Dawei Zhang, Kuang Zhang, Qun Wu, Guohui Yang, and Xuejun Sha
Opt. Lett. 42(14) 2766-2769 (2017)