Giant two-photon absorption response from a silicon quasi-BIC metasurface

We propose an amorphous silicon (a-Si) metasurface based on a quasi-bound state in the continuum (q-BIC) with a theoretical Q-factor up to 930, which consists of Π-like nanostructures with symmetrical defects. The influences of slot offset parameter and the size of added symmetric defect on the near...

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Veröffentlicht in:	Applied physics letters 2023-11, Vol.123 (21)
Hauptverfasser:	Xie, Hailun, Gui, Lili, Liu, Yiwen, Lin, Fengbin, Zhang, Zhongshan, Xu, Kun
Format:	Artikel
Sprache:	eng
Schlagworte:	Amorphous silicon Applied physics Defects Far fields Metasurfaces Nonlinear optics Photon absorption Photons Silicon films
Online-Zugang:	Volltext
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