Magnetically driven Terahertz spectral filters and their applications

磁驱动太赫兹光谱滤波器及其应用

• 批准号: 479676-2015
• 负责人: Morandotti, Roberto
• 金额: $ 7.28万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618909
• 关键词: Magnetically; driven; Terahertz; spectral; filters

Nowadays, impressive innovations in the field of nonlinear optics have paved the way for the realization of new reliable Terahertz (THz) sources and detectors and, only recently, fully operating devices. The aim of this collaborative Research and Development project, proposed in collaboration with our two industrial partners Novacam Technologies Inc. and QPS Photronics Inc., is to demonstrate the feasibility and effectiveness of a series of novel devices engineered for the manipulation of THz waves. In particular, we propose to demonstrate a magnetically driven tunable spectral filter in the THz frequency range. Such a device will rely on the two-wire THz waveguide previously demonstrated by the PI. The main idea is to directly write a Bragg grating (BG) onto the metallic structure of our waveguide, thus acting as notch (i.e., rejection) filter for the broadband THz propagating pulse. With the aim of further tuning the central frequency and the linewidth of such a filter we will propose to combine our device with a particular class of magnetic materials, named Ferrofluids, which are mostly transparent in the THz range. Ferrofluids have the property to change their refractive index when biased by an external static magnetic field. By embedding such materials in the structure of the BG, we will finally achieve a filter whose spectral response can be modified in real-time (i.e., dynamically), in function of the applied external magnetic fields, thus allowing a low loss reshaping of the THz pulse bandwidth. We believe that the compact and affordable dynamically tuned THz spectral filters we intend to develop in this project will play a key role in the forthcoming fields of THz imaging and next-generation high-speed wireless communications, which will consist of high speed broadband wireless data transfer within and outside buildings on short distances. Furthermore, such devices have already created a significant interest for our industrial partners who intend to significantly increase their presence on the growing THz market, by providing leading-edge products for the manipulation of THz radiation. The project results will allow Canada to increase its global share of the growing ICT market, above all in the burgeoning areas of imaging and signal processing.

如今，非线性光学领域令人印象深刻的创新为实现新型可靠的太赫兹 (THz) 源和探测器以及最近全面运行的设备铺平了道路。该合作研发项目是与我们的两个工业合作伙伴 Novacam Technologies Inc. 和 QPS Photronics Inc. 合作提出的，其目的是展示一系列用于操纵太赫兹波的新型设备的可行性和有效性。特别是，我们建议展示太赫兹频率范围内的磁驱动可调谐光谱滤波器。这样的设备将依赖于 PI 先前演示的两线太赫兹波导。主要思想是将布拉格光栅（BG）直接写入波导的金属结构上，从而充当宽带太赫兹传播脉冲的陷波（即抑制）滤波器。为了进一步调整这种滤波器的中心频率和线宽，我们建议将我们的设备与一类特殊的磁性材料（称为铁磁流体）相结合，这种材料在太赫兹范围内大多是透明的。当受到外部静磁场的偏置时，铁磁流体具有改变其折射率的特性。通过将此类材料嵌入 BG 结构中，我们最终将实现一种滤波器，其光谱响应可以根据所施加的外部磁场进行实时（即动态）修改，从而实现对 BG 的低损耗重塑。太赫兹脉冲带宽。我们相信，我们打算在该项目中开发的紧凑且经济实惠的动态调谐太赫兹光谱滤波器将在即将到来的太赫兹成像和下一代高速无线通信领域发挥关键作用，其中包括高速宽带无线数据建筑物内和建筑物外的短距离转移。此外，此类设备已经引起了我们的工业合作伙伴的极大兴趣，他们打算通过提供用于操纵太赫兹辐射的领先产品来显着增加其在不断增长的太赫兹市场上的影响力。该项目的成果将使加拿大能够增加其在不断增长的信息通信技术市场中的全球份额，尤其是在新兴的成像和信号处理领域。