Novel Ferroelectric Photonic Band-Gap Structures: a Feasibility Study

新型铁电光子带隙结构：可行性研究

• 批准号: EP/D063914/1
• 负责人: Pamela Thomas
• 金额: $ 8.91万
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FD063914%2F1
• 关键词: Novel; Ferroelectric; Photonic; Band; Gap

A photonic band gap is created when a material is patterned in a periodic fashion, typically by drilling in a periodic pattern of holes on a scale of microns. The properties of light in this periodically-patterned medium are vastly changed, with interactions at some specific wavelengths becoming very much stronger. The adventure and innovation in this pilot study is in the combination of photonic band gap patterning with highly nonlinear epitaxial single-crystal ferroelectric materials in a waveguiding format, thus adding vertical confinement of light to the lateral patterning. With such a combination,we can conceive of making massive gains in optical device efficiency which, in turn, will allow faster speeds of data transfer and processing in optical communications in miniaturised device formats. A key question to answer in this feasibility study is whether ferroelectric waveguiding layers can be grown with sufficiently high optical quality and sufficiently low optical loss to demonstrate the enhancements in nonlinear optical effects predicted by theory. With proof of concept in mind, we have chosen to demonstrate a number of simple key devices in the well-known lithium niobate/lithium tantalate nonlinear optical system. We seek to show that custom-designed and dedicated epitaxial growth of high-quality films by both liquid phase epitaxy and epitaxial growth by melting will yield material of the necessary quality for subsequent photonic band-gap patterning and novel device demonstration. This will set the platform for a full programme involving a wider range of more exotic materials and more elaborate device formats at the end of this one-year study. To our knowledge, this is the first time that such a programme to combine the exciting new advances in photonic band-gap engineering with highly nonlinear ferroelectric epitaxial layers has been undertaken. We are uniquely placed to achieve the aims of this one-year programme because of the collaboration between groups at Warwick and Bristol, which combines their respective expertise in materials growth and characterisation and optical device design, fabrication and testing.

当材料以周期性的方式形成材料时，通常会通过以微米尺度上的定期孔进行钻孔时，就会产生光子带隙。这种定期图案的介质中光的特性发生了很大变化，在某些特定波长下的相互作用变得非常强大。这项试验研究中的冒险和创新是在波带隙形式与高度非线性外延单晶铁电材料的结合，以波浪形式，从而将光的垂直限制在横向图案中增加。通过这样的组合，我们可以构想在光学设备效率方面的巨大提升，这反过来又可以更快地以微型设备格式的光学通信中的数据传输和处理速度。在这项可行性研究中要回答的一个关键问题是，是否可以以足够高的光学质量和足够低的光学损失来生长铁电波层，以证明理论预测的非线性光学效应的增强。考虑到概念证明，我们选择在著名的尼贝特锂/诱导锂锂非线性光学系统中演示许多简单的关键设备。我们试图表明，通过液相外延和外延生长融化，定制设计和专用的高质量膜的外延生长将产生随后的光子带隙图案和新型设备演示的必要质量。这将为一项一年的研究结束时，为一个完整的程序设定了一个完整的计划，涉及更广泛的外来材料和更精细的设备格式。据我们所知，这是将这种计划结合到光子带隙工程中令人兴奋的新进步与高度非线性铁电上遵守层的计划。由于沃里克（Warwick）和布里斯托尔（Bristol）的团体之间的合作，我们的目标是实现这一为期一年的计划的独特之处，后者结合了他们在材料增长和表征以及光学设备设计，制造和测试方面的专业知识。

项目成果

Proton exchange and diffusion in LiNbO3 using inductance coupled high density plasma

使用电感耦合高密度等离子体在 LiNbO3 中进行质子交换和扩散

• DOI: 10.1116/1.2746052
• 发表时间: 2007
• 期刊: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena
• 作者: Ren Z