Nonlinear imaging through magnetic dipole quasi-BIC ultra-thin resonators

Lei Xu; Khosro Zangeneh Kamali; Lujun Huang; Mohsen Rahmani; Alexander Smirnov; Rocio Camacho-Morales; Yixuan Ma; Guoquan Zhang; Matt Woolley; Dragomir N. Neshev; Andrey E. Miroshnichenko

doi:10.1117/12.2541094

31 December 2019 Nonlinear imaging through magnetic dipole quasi-BIC ultra-thin resonators

Lei Xu, Khosro Zangeneh Kamali, Lujun Huang, Mohsen Rahmani, Alexander Smirnov, Rocio Camacho-Morales, Yixuan Ma, Guoquan Zhang, Matt Woolley, Dragomir N. Neshev, Andrey E. Miroshnichenko

Author Affiliations +

Proceedings Volume 11201, SPIE Micro + Nano Materials, Devices, and Applications 2019; 112011D (2019) https://doi.org/10.1117/12.2541094
Event: ANZCOP, 2019, Melbourne, Australia

Abstract

We propose an ultra-thin silicon metasurface supporting a high-quality leaky mode which is formed by partially breaking a bound-state-in-the-continuum (BIC) generated by the collective magnetic dipole (MD) resonance excited in the subdiffractive periodic systems. Such a quasi-BIC MD state leads to a robust near-field enhancement and a significant boost of the nonlinear process, resulting in measured 500-fold enhancement of third-harmonic emission in comparison to the conventional silicon disk metasurface. We further experimentally demonstrate the highly-efficient nonlinear image tuning via polarisation and wavelength control, opening the way for various applications in high-performance nonlinear metadevices including tunable laser, tunable displays, nonlinear imaging.

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Lei Xu, Khosro Zangeneh Kamali, Lujun Huang, Mohsen Rahmani, Alexander Smirnov, Rocio Camacho-Morales, Yixuan Ma, Guoquan Zhang, Matt Woolley, Dragomir N. Neshev, and Andrey E. Miroshnichenko "Nonlinear imaging through magnetic dipole quasi-BIC ultra-thin resonators", Proc. SPIE 11201, SPIE Micro + Nano Materials, Devices, and Applications 2019, 112011D (31 December 2019); https://doi.org/10.1117/12.2541094

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