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Proceedings Paper

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

Paper Details

Date Published: 31 December 2019
PDF: 2 pages
Proc. SPIE 11201, SPIE Micro + Nano Materials, Devices, and Applications 2019, 112011D (31 December 2019); doi: 10.1117/12.2541094
Show Author Affiliations
Lei Xu, The Univ. of New South Wales (Australia)
Khosro Zangeneh Kamali, The Australian National Univ. (Australia)
Lujun Huang, The Univ. of New South Wales (Australia)
Mohsen Rahmani, The Australian National Univ. (Australia)
Alexander Smirnov, Institute of Applied Physics (Russian Federation)
Rocio Camacho-Morales, The Australian National Univ. (Australia)
Yixuan Ma, Nankai Univ. (China)
Guoquan Zhang, Nankai Univ. (China)
Matt Woolley, The Univ. of New South Wales (Australia)
Dragomir N. Neshev, The Australian National Univ. (Australia)
Andrey E. Miroshnichenko, The Univ. of New South Wales (Australia)

Published in SPIE Proceedings Vol. 11201:
SPIE Micro + Nano Materials, Devices, and Applications 2019
M. Cather Simpson; Saulius Juodkazis, Editor(s)

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