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説明:

We propose a simple scheme of degenerate spontaneous parametric down-conversion (SPDC) in nonlinear metasurfaces or photonic crystal slabs with quasi-guided modes.
It employs a band crossing between even- and odd-parity quasi-guided mode bands inside the light cone (above the light line) and a selection rule in the conversion efficiency of the SPDC.
The efficiency can be evaluated fully classically via the inverse process of noncollinear second-harmonic generation (SHG). As a toy model, we study the SPDC and SHG in a monolayer of noncentrosymmetric spheres and confirm that the scenario works well to enhance the SPDC.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: nonlinear optics, SPDC, quasi-guided modes

刊行年月日: 2024-03-25

出版者: Optica Publishing Group

掲載誌:

• Optics Express (ISSN: 10944087) vol. 32 issue. 7 p. 11065-11078

研究助成金:

• Japan Society for the Promotion of Science 22K03488

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1364/oe.514969

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更新時刻: 2024-05-14 12:30:16 +0900

MDRでの公開時刻: 2024-05-14 12:30:16 +0900