Nonlinear Optics in Waveguides Coupled With Photonic Band Gap Structures

PI提出设计，制造，表征和测试波导几何，周期性纹理非线性光学器件。质子交换和反向质子交换工艺将被用于制造铌酸锂波导。利用紫外激光光刻技术在广泛的区域上对叠层进行图案化。PI已经开发了利用紫外激光设备制造一维和二维光子带隙（PBG）结构的能力，晶格常数从150 nm到约2微米不等。图案将使用等离子体蚀刻技术，特别是电感耦合等离子体蚀刻来控制反应性和保持蚀刻过程的各向异性。波导的光学特性，如模式折射率和损耗，将在我们的实验室中进行表征。激光二极管泵浦将用于制造紧凑、短波长的发射源。其他衍生应用将被研究，例如，太赫兹波的产生，基于pbg的电光调制器，以及红外波长的参数产生或振荡。计划模拟我们复杂的三维传播几何将有助于优化设计参数和最小化损失。对于铌酸锂PBG波导，他的矢量耦合模式理论计算预测，与相同长度的准相位匹配器件相比，二次谐波和参数产生输出效率将提高两个数量级。他的实验就是为了验证这些结果。此外，他将探索二维光子晶体的特性，以进一步改善基于大色散、共振场增强和低群速度的频率产生，这是与带边无关的高维PBGs普遍存在的特征。他将对一维和二维PBGs的谐振模式特性进行理论研究，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。光子带隙结构以其独特的性质和广泛的应用前景受到了广泛的关注。相干PBG源可能影响存储技术、成像、空间通信、静电复印、医疗光疗、生物检测和紫外光刻的未来发展。学生将获得开发未来基于pbg的光电器件的技能和知识。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，他们将发展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