Squeeze free space with nonlocal flat optics

被引：75

作者：

Guo, Cheng ^{[1
]}

Wang, Haiwen ^{[1
]}

Fan, Shanhui ^{[2
,3
]}

机构：

[1] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[2] Stanford Univ, Ginzton Lab, Stanford, CA 94305 USA

[3] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA

来源：

OPTICA | 2020年 / 7卷 / 09期

关键词：

FANO RESONANCES; RESOLUTION;

D O I：

10.1364/OPTICA.392978

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

There has been substantial interest in miniaturizing optical systems by flat optics. However, one essential optical component, free space, fundamentally cannot be substituted with conventional local flat optics with space-dependent transfer functions, since the transfer function of free space is momentum-dependent instead. Overcoming this difficulty is important to achieve the utmost miniaturization of optical systems. In this work, we show that free space can be substituted with nonlocal flat optics operating directly in the momentum domain. We derive the general criteria for an optical device to replace free space and provide two concrete designs of photonic crystal slab devices. Such devices can substitute much thicker free space. Our work paves the way for the utmost miniaturization of optical systems using a combination of local and nonlocal flat optics. (c) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：1133 / 1138

页数：6

共 31 条

[1] Photonic-crystal slabs with a triangular lattice of triangular holes investigated using a guided-mode expansion method [J].