论文标题
可调食品染色溶液中的非线性指导
Nonlinear guiding of light in tunable food-dye solutions
论文作者
论文摘要
我们提供了在食用染料溶液中的非线性自我诱捕的第一次演示,从而导致污垢廉价的孤子波导。在这种溶液中观察到的光学自我关注的非线性归因于作用于染料分子的光吸收力,因为在相对较高的功率下的热效应会导致自我消除的非线性。我们发现,当激光波长切换到所有测试的食物染料接近峰值吸收时,非线性响应会增加。此外,可以通过制作不同食品染料的目的样品来调整吸收依赖性的非线性。特别是,随着染料溶液的适当混合,非线性响应是针对其他无活性波长产生的,从而导致两种不同波长的梁之间的相互作用以及形成耦合的孤子样对。在毫米的低功率水平下,在食物染色溶液中以一个波长实现的自捕获可以作为其他波长的光束的低成本波导。
We provide the first demonstration of nonlinear self-trapping of light in solutions of food coloring dyes, leading to dirt cheap soliton waveguides. The optical self-focusing nonlinearity observed in such solutions is attributed to the optical absorption force acting on dye molecules, as the thermal effect at relatively higher power results in a self-defocusing nonlinearity. We found the nonlinear response increases when the laser wavelength is switched to near the peak absorption for all food dyes tested. Furthermore, the absorption-dependent nonlinearity can be tuned by making purposive samples of different food dyes. In particular, with appropriately mixing of dye solutions, nonlinear response arises for otherwise inactive wavelengths, leading to interaction between two beams of different wavelengths and formation of a coupled soliton-like pair. At milliwatt low power levels, self-trapping achieved at one wavelength in food-dye solutions can serve as low-cost waveguides for optical beams at other wavelengths.