Vyas Sunil, Chia Yu Hsin, Luo Yuan
Opt Express. 2018 Aug 20;26(17):21979-21991. doi: 10.1364/OE.26.021979.
Utilizing multiplexed volume holography, a single optical element, enabling to shape structural variants of non-diffracting Airy wavefronts, from one-dimensional Airy mode to unconventional Airy modes such as vortex Airy and quad Airy modes, has been experimentally realized. Here, beam shaped angularly multiplexed volume holographic gratings (AMVHGs) are recorded in PQ: PMMA photopolymer, where five different spatial wavefronts of Airy beams have been sequentially recorded, for simultaneous reconstruction of different Airy modes, by a conventional Gaussian beam. Spatial and spectral mode selective properties of AMVHGs are demonstrated by narrow-band as well as by broadband light source. In addition, through wavelength degeneracy property, the maximum sensitivity wavelength of blue (488 nm) is used for recording in PQ: PMMA, but the AMVHGs are operated at a broad wavelength band of interest, all the way to longer wavelength in near infrared (850 nm). The K-sphere representation is used to explain the spectral properties of AMVHGs.
利用多路复用体全息技术，实验实现了一种单一光学元件，它能够塑造非衍射艾里波前的结构变体，从一维艾里模式到非常规艾里模式，如涡旋艾里模式和四重艾里模式。在此，光束整形角度复用体全息光栅（AMVHGs）记录在PQ:PMMA光聚合物中，其中已依次记录了艾里光束的五种不同空间波前，以便通过传统高斯光束同时重建不同的艾里模式。窄带和宽带光源都证明了AMVHGs的空间和光谱模式选择特性。此外，通过波长简并特性，蓝色（488nm）的最大灵敏波长用于在PQ:PMMA中记录，但AMVHGs在感兴趣的宽波段上运行，一直到近红外（850nm）的更长波长。K球表示法用于解释AMVHGs的光谱特性。
