Hao Weiming, Wang Jian, Chen Lin
Opt Lett. 2021 Sep 1;46(17):4084-4087. doi: 10.1364/OL.433672.
Optical Airy beams have wide-ranging applications in photonics, but conventional approaches for generating Airy beams require bulky and strictly aligned optical systems. Here, we propose on-chip compact Airy beam emitters by using a shallow-etched holography grating on a silicon platform. The holography grating, formed by the binary interferogram of the guided wave and the spatial Airy beam, can scatter the guided waves into spatial waves with the phase distributions being consistent with those of Airy beam. The simulation demonstrates that a 20µ×20µ holography grating on a strip waveguide enables the realization of 2D Airy beam within the wavelength range from 1490 to 1570 nm. Our results suggest a promising avenue towards potential applications in on-chip imaging, optical forces, optical interconnection, etc.
光学艾里光束在光子学领域有着广泛的应用，但传统的产生艾里光束的方法需要庞大且严格对准的光学系统。在此，我们提出通过在硅平台上使用浅蚀刻全息光栅来实现片上紧凑型艾里光束发射器。该全息光栅由导波和空间艾里光束的二元干涉图形成，可将导波散射为相位分布与艾里光束一致的空间波。模拟表明，条形波导上的20µ×20µ全息光栅能够在1490至1570nm波长范围内实现二维艾里光束。我们的结果为片上成像、光力、光互连等潜在应用提供了一条有前景的途径。
