Lucchetta Daniele Eugenio, Di Donato Andrea, Francescangeli Oriano, Singh Gautam, Castagna Riccardo
Dip. SIMAU, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy.
Dip. DII, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy.
Nanomaterials (Basel). 2022 Aug 23;12(17):2890. doi: 10.3390/nano12172890.
We report on the realization of Distributed Feedback (DFB) lasing by a high-resolution reflection grating integrated in a Photomobile Polymer (PMP) film. The grating is recorded in a recently developed holographic mixture basically containing halolakanes/acrylates and a fluorescent dye molecule (Rhodamine 6G). The PMP-mixture is placed around the grating spot and a subsequent curing/photo-polymerization process is promoted by UV-irradiation. Such a process brings to the simultaneous formation of the PMP-film and the covalent link of the PMP-film to the DFB-grating area (PMP-DFB system). The PMP-DFB allows lasing action when optically pumped with a nano-pulsed green laser source. Moreover, under a low-power light-irradiation the PMP-DFB bends inducing a spatial readdressing of the DFB-laser emission. This device is the first example of a light-controlled direction of a DFB laser emission. It could represent a novel disruptive optical technology in many fields of Science, making feasible the approach to free standing and light-controllable lasers.
我们报道了通过集成在光移动聚合物(PMP)薄膜中的高分辨率反射光栅实现分布式反馈(DFB)激光发射。该光栅记录在一种最近开发的全息混合物中,该混合物主要包含卤代烷烃/丙烯酸酯和一种荧光染料分子(罗丹明6G)。将PMP混合物置于光栅光斑周围,随后通过紫外线照射促进固化/光聚合过程。这样的过程导致同时形成PMP薄膜以及PMP薄膜与DFB光栅区域的共价连接(PMP-DFB系统)。当用纳米脉冲绿色激光源进行光泵浦时,PMP-DFB可实现激光发射。此外,在低功率光照射下,PMP-DFB会弯曲,从而引起DFB激光发射的空间重新定向。该器件是DFB激光发射光控方向的首个实例。它可能代表了科学诸多领域中的一种新型颠覆性光学技术,使得独立式和光控激光器的实现成为可能。