Nonlinear Optics in Waveguides Coupled With Photonic Band Gap Structures

0140109豪斯PI提出设计，制造，表征和测试波导几何形状，周期性纹理非线性光学器件。质子交换和反向质子交换过程将被用来在锂离子酸盐中制造波导。使用UV激光光刻在宽区域上图案化覆层。PI已经开发出利用紫外激光设备制造一维（1D）和二维（2D）光子带隙（PBG）结构的能力，其晶格常数从150 nm变化到约2微米。图案化将使用等离子体蚀刻技术来完成，特别是电感耦合等离子体蚀刻，以控制反应性并保持蚀刻工艺的各向异性。波导的光学特性，如模式指数和损耗，将在我们的实验室进行表征。激光二极管泵浦将用于制造紧凑的短波长发射源。其他附带的应用将被检查，如，太赫兹波的产生，PBG为基础的电光调制器，并在红外波长的参量产生或振荡。计划模拟我们的复杂的三维传播几何形状将有助于优化设计参数，并最大限度地减少损失。对于锂酸盐PBG波导，他的矢量耦合模理论计算预测，二次谐波和参量产生输出效率将比相同长度的准相位匹配器件提高两个数量级。他的实验就是为了检验这些结果而设计的。此外，他将探索2D光子晶体的特性，以进一步提高基于大色散，共振场增强和低群速度的频率生成，这是与带边无关的高维PBG的普遍特征。他将对一维和二维光子带隙的谐振模特性进行理论研究，以确定光栅和波导的制造问题，并在样品制造过程中测试设计。光子带隙结构因其独特的特性和广泛的应用潜力而受到广泛关注。相干的光子带隙源可能会影响存储技术、成像、空间通信、静电复印、医学光疗、生物测定和紫外光刻等领域的未来发展。学生将接受技能和知识的培训，以开发未来基于PBG的光电器件。他们将制造和表征器件，并通过与建模和仿真结果进行比较来测试设计的准确性。因此，他们将开发广泛的实验室和建模经验，

0140109HausThe PI proposes to design, fabricate, characterize, and test waveguide-geometry, periodically textured nonlinear optical devices. Proton exchange and reverse proton exchange processes will be used to fabricate waveguides in lithium niobate. The superstrate is patterned over a wide area using UV laser lithography. The PI has developed the capability to fabricate one- (1D) and two-dimensional (2D) photonic band gap (PBG) structures with the UV laser facility with lattice constants varied from 150 nm to about 2 microns. Patterning will be done using plasma etching techniques, especially inductively coupled plasma etching to control reactivity and retain anisotropy of the etch process. The optical properties of the waveguides, such as mode index and loss, will be characterized in our laboratories. The laser diode pumps will be used to make compact, short wavelength, emission sources. Other spin-off applications will be examined, such as, terahertz wave generation, PBG-based electro-optic modulators, and parametric generation or oscillation at infrared wavelengths.Planned simulations of our complex three-dimensional propagation geometry will help optimize the design parameters and minimize the losses. For lithium niobate PBG waveguides his vector coupled-mode theory calculations predict that the second-harmonic and parametric generation output efficiency will be enhanced by two orders of magnitude over quasi-phase matched devices of the same length. His experiments are designed to test these results. Furthermore, he will explore the properties of 2D photonic crystals to further improve frequency generation based on the large dispersion, resonant field enhancement, and low group velocity, which is an ubiquitous feature of higher dimensional PBGs not related to a band edge. He will conduct a theoretical study of the resonant mode characteristics of 1D and 2D PBGs to determine the grating and waveguide fabrication issues and test the designs in the sample fabrication process.Photonic band gap structures have received wide attention because of their unique properties and potential for diverse applications. The coherent, PBG sources could impact future developments in storage technology, imaging, space communications, xerography, medical photo-therapy, bio-assays, and UV lithography. Students will be trained with the skills and knowledge to develop future PBG-based optoelectronic devices. They will fabricate and characterize the devices and test the accuracy of the designs by comparing with modeling and simulation results. Hence they will have developed a broad range of laboratory and modeling experien