Pulse Propagation in Periodic Dielectric Materials

项目名称：脉冲在周期性介电材料中的传播分析：本研究将从理论上和实验上研究电磁波在含有强非线性吸收和非线性折射的新型材料的光子带隙（PBG）结构中的传播。在光子带隙结构中，周期阵列引入了光学禁带，类似于固体晶体中的电子带隙。随着具有强非线性折射的材料引入到PBG系统中，预计会引入额外的PBG效应，这些效应也是可以控制的。在通道中引入具有强非线性反饱和吸收的材料，会导致光学响应的强度受到材料和光子晶体的衍射和散射特性的限制。在强光成为问题的任何情况下，这种结构都有许多应用。本研究中的PBG结构将是宽带的，以提供波长敏捷保护，并能够在宽视场下工作。与海军研究实验室（NRL）的研究人员建立了强有力的直接实验合作。该研究的NRL部分将由陆军研究办公室（ARO）通过NSF通过与伦萨勒理工学院的分包合同资助。随函附上一份定义NRL研究贡献的ARO增强奖工作声明副本，以及ARO评审。RPI的理论研究与NRL的实验实现直接相关。

Proposal Number: ECS-9630068 Principal Investigator: Joseph Haus Title: Pulse Propagation in Periodic Dielectric Materials Analysis: In this research, electromagnetic wave propagation in photonic band gap (PBG) structures, containing new materials with both strong nonlinear absorption and nonlinear refraction, will be theoretically and experimentally investigated. In a photonic band gap structure, a periodic array introduces optically forbidden bands in analogy with electronic band gaps in solid state crystals. With the introduction of materials with a strong nonlinear refraction into a PBG system, it is expected that additional PBG effects will be introduced, which can also be controlled. Introduction of materials with a strong nonlinear reverse saturable absorption, into channels should result in a structure in which the optical response is limited in intensity by the material and by the diffraction and scattering properties of the photonic crystal. There are many applications for such structures in any situation in which intense light is a problem. The PBG structures in this investigation will be broad band to provide wavelength agile protection and will be capable of operating with a wide field of view. A strong direct experimental collaboration with researchers at the Naval Research Laboratory (NRL) has been established. The NRL component of the research will be funded by the Army Research Office (ARO), through NSF, via subcontract with Renssalear Polytechnic Institute. A copy of the ARO Augmentation Award Statement of Work defining the NRL research contribution, and the ARO reviews, are attached. The theoretical investigation at RPI is directly coupled to the experimental realization at NRL.