Novel Inorganic/Organic Hybrid Photonics Material via Laser Assisted Molecular Beam Deposition

小行星9526024 该提案中描述的研究旨在为光子学应用产生新型复合材料。所提出的无机：有机杂化材料的薄膜将通过激光辅助分子束沉积技术制造。这些薄膜的结构，线性和非线性光学特性将进行。复合材料的微环境将使用有机荧光探针进行研究，其荧光峰，寿命，量子产率和各向异性高度依赖于微环境。光学质量将通过测量波导损耗来评估。 为了研究三阶非线性光学特性，利用飞秒激光脉冲，结合克尔门、瞬态吸收和简并四波混频，实现了对三阶非线性光学特性的研究。此外，还将研究平面光波导结构和法布里-珀罗腔模式下的三阶非线性光学过程。在二阶非线性光学研究中，通过极化过程将在制备的薄膜中引入必要的极性结构。二阶非线性光学材料将利用二次谐波产生和电光调制来研究。 当前材料科学的一个前沿领域是开发新型高性能多功能材料，以应用新兴的最先进技术，如光子学，生物光子学和光电子学。提出了一种新的方法，在这个建议的一类新的无机：有机杂化材料的光子学薄膜的制备通过激光辅助分子束沉积。通过该技术生产的所提出的新型无机：有机杂化材料联合收割机将无机物的高光学质量和环境稳定性与有机物的快速且大的非线性光学响应结合。产生无机：有机复合材料的激光辅助分子束沉积方法是非常独特的，因为它涉及将有机蒸气直接低温接种到由激光烧蚀产生的无机氧化物的分子束膨胀中。薄膜直接生长在位于分子束路径下游的所需衬底上。 ***

9526024 Prasad The research described in this proposal is designed to generate novel composite materials for photonics applications. Thin films of the proposed inorganic:organic hybrid materials will be fabricated via the laser assisted molecular beam deposition technique. The structural, linear and nonlinear optical characterization of these films will be conducted. The microenvironment of the composite will be investigated using organic fluorescent probes whose fluorescent peak, lifetime, quantum yield and anisotropy are highly dependent on the microenvironment. The optical quality will be evaluated by measuring the waveguide losses. For the investigation of the third-order nonlinear optical properties, which can be used for all optical signal processing in photonics, a combination of Kerr gate, transient absorption and degenerate four-wave mixing will be performed using femtosecond laser pulses. Also, the third- order nonlinear optical processes will be studied in planar optical waveguide configuration and in the Fabry-Perot cavity mode. For second order nonlinear optical investi- gations, necessary polar structure will be introduced in the fabricated films via the poling process. The second-order nonlinear optical materials will be studied using both second harmonic generation and electro-optic modulation. %%% A frontier area of current material science is the development of novel high performance mutifunctional materials for the application of emerging state-of-the-art technologies such as photonics, biophotonics and optoelectronics. A novel approach is presented in this proposal for the fabrication of thin films of a new class of inorganic:organic hybrid materials for photonics via laser assisted molecular beam deposition. The proposed novel inorganic:organic hybrid materials produced by this technique combine the high optical quality and environmental stability of inorganics with the fast and large nonlinear optical response of organics. The laser as sisted molecular beam deposition approach of generating inorganic:organic composites is highly unique in that it involves direct low temperature seeding of an organic vapor into a molecular beam expansion of the inorganic oxide produced by laser ablation. Films are grown directly on a desired substrate which is situated downstream in the path of the molecular beam. ***