基于飞秒激光调控钨电子状态的表面等离激元调制机理及器件研究

基于飞秒激光调控钨电子状态的表面等离激元（Surface Plasmon Polaritons, SPPs)调制器具有超快、微型化、结构简单以及容易制作的优点，将会在光子计算和光通讯等领域具有极大的应用前景。本项目首先研究飞秒激光与金属钨相互作用的超快物理过程和机制，揭示基于飞秒激光调控钨电子状态的超快SPPs调制机理，阐明飞秒激光改变钨瞬时光学性质的操控方法，提出超快、高稳定性、低功耗的SPPs调制方法，建立一种新颖微型钨基SPPs调制器模型；然后研究基于飞秒激光诱导银表面微纳条纹的SPPs波导制备方法，优化飞秒激光直写加工金属微纳器件的方法，并制备钨基SPPs调制器；最后研究超快钨基SPPs调制器在微纳光学神经网络计算的应用。项目的开展将促进基于飞秒激光调控钨电子状态的超快SPPs调制器、微纳光学神经元器件和飞秒激光微纳制造技术的发展和应用。

The modulator for surface plasmon polaritons (SPPs) based on the electronic state in tungsten has some advantages, for example, ultrafast, micro-scale, simple structure and easy-making. This modulator has the important potential applications in the fields of photonic calculation and optical communication. The project investigates the physical processes and mechanisms in the interaction between femtosecond laser and metal tungsten, reveals the ultrafast SPPs modulation mechanism based on tungsten electron state controlled by femtosecond laser, clarifies the manipulation method to change tungsten transient optical properties by femtosecond laser, proposes an ultrafast, high-stability and low-power SPPs modulation method, and a novel model of micro SPPs modulator is established based on tungsten; Then, the fabrication method for SPPs waveguide is studied based on femtosecond laser-induced silver nano-stripes, and the fabrication method for micro/nano devices is optimized by femtosecond laser direct writing, and the tungsten SPPs modulator is prepared. Finally, the application of ultrafast SPPs modulator is investigated in the micro/nano optical neural network. The project will promote the development and application of the SPPs modulator based on the tungsten eletronic state controlled by femtosecond laser, the micro/nano optical neuron devices and femtosecond laser micro/nano-fabrication technology.