Next-Generation High-Speed Sensors for 3D Imaging Applications

该提案的重点是实现用于光探测和测距（LiDAR）系统的高频光电器件。LiDAR技术对于辅助和自动驾驶汽车以及智能手机和耳机等消费电子应用非常重要，可以实现增强现实和虚拟现实。 快速灵敏的光电检测对于实现高分辨率、高精度和高检测范围至关重要。我们最近开发了使用金属卤化物钙钛矿的溶液处理超快光电探测器。这些在灵敏度速度方面优于现有的硅解决方案。我们还开发了胶体量子点光电探测器，将灵敏度扩展到红外（>1300 nm）。这在LiDAR系统中是期望的，以通过大幅减少来自阳光的限制性背景噪声来提高眼睛安全性并提高灵敏度。 新的光电探测器的响应时间是快于60 ps每脉冲，使用借来的16 GHz示波器获得的发现。现在，我们必须构建一个3D成像LiDAR原型，以便与现有技术进行直接比较。 由于我们小组缺少高频示波器，目前无法取得进一步进展。高频表征对于评估我们的探测器的时间响应至关重要，具有评估上升和下降时间以及振铃效应所需的分辨率。这些将为后续步骤提供对器械和材料限制的进一步了解和反馈。除此之外，拟议中的设备将有助于推进我们光电项目中的其他研究项目。 这些设备将为下一代加拿大研究人员提供先进的高质量培训。我们预计在首五年内，将有超过90名学员大量使用这些设备。

The focus of this proposal is to pursue the realization of high-frequency optoelectronic devices for light detection and ranging (LiDAR) systems. LiDAR technology is of importance for aided- and self-driving cars as well as for consumer electronic applications such as smartphones and headsets to enable augmented and virtual reality. Fast and sensitive photodetection is crucial to enable high resolution, accuracy, and detection range. We have recently developed solution-processed ultrafast photodetectors using metal halide perovskites. These outperform existing silicon solution in sensitivity speed. We have also developed colloidal quantum dot photodetectors that extend the sensitivity into the infrared (>1300 nm). This is desired in LiDAR systems to improve eye-safety and improve sensitivity by drastically reducing the limiting background noise from sunlight. The response time of the new photodetectors is faster than 60 ps per pulse, a finding obtained using a loaned 16 GHz oscilloscope. Now we must construct a 3D imaging LiDAR prototype to enable a direct comparison with existing technologies. The lack of a high-frequency oscilloscope in our group is right now precluding further progress. High-frequency characterization is critical to assess the time response of our detectors with the needed resolution to assess rise and fall times as well as ringing effects. These will provide further insights into device and materials limitations and feedback for subsequent steps. Beyond the above, the proposed equipment will help to advance other research programs within our optoelectronic programs. The equipment will provide advanced high-quality training for the next generation of Canadian researchers. We anticipate this equipment will be heavily used by over 90 trainees in the first five years.