Russell L. T. Schwartz, Hao Wang, Chandraman Patil, Martin Thomaschewski, Volker J. Sorger
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Such dense and repeatable detector realization is enabled by a novel, selective, contamination-free 2D material transfer system, that we report here in automated operation. The so realized photodetectors responsivity peaks at a high 0.8 A/W. Furthermore, we achieve uniform detector performance via bias voltage tuning calibration to maximize deployment. Lastly, we demonstrate 2D arrayed photodetectors not only on a silicon chip platform but verify array performance on flexible polymer substrates. 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引用次数: 0
摘要
基于光电探测器的像素传感器阵列在现代设备中无处不在,例如智能手机相机,汽车,无人机,笔记本电脑等。基于二维(2D)材料的光电探测器阵列是一个相关的候选,特别是对于要求平面形状因素的应用。然而,像素密度和原型设计没有交叉污染的缺点限制了技术的采用和影响。此外,虽然2D材料探测器具有高吸收率,但石墨烯的闭合带隙会导致不受欢迎的高暗电流。本文介绍了密集平面光电探测器阵列的实验演示。我们展示了一个微米窄的倾斜二维探测器像素,并通过验证16像素探测器阵列的执行来展示这种方法的可重复性。这种密集和可重复的探测器实现是由一种新颖的、选择性的、无污染的二维材料传输系统实现的,我们在这里报告了自动化操作。实现的光电探测器的响应率峰值为0.8 a /W。此外,我们通过偏置电压调谐校准来实现均匀的检测器性能,以最大化部署。最后,我们不仅在硅芯片平台上展示了二维阵列光电探测器,而且验证了阵列在柔性聚合物衬底上的性能。致密排列、扁平、可弯曲和均匀性能的光电探测器像素使新兴技术能够应用于需要轻量化和可靠性能的领域,例如智能手机和新兴VR/AR市场,以及智能设备、可穿戴设备,以及尺寸-重量-功率受限的航空和航天平台。
MoS2 based 2D material photodetector array with high pixel density
Arrays of photodetector-based pixel sensors are ubiquitous in modern devices, such as smart phone cameras, automobiles, drones, laptops etc. Two-dimensional (2D) material-based photodetector arrays are a relevant candidate, especially for applications demanding planar form factors. However, shortcomings in pixel density and prototyping without cross contamination limit technology adoption and impact. Also, while 2D material detectors offer high absorption, graphene’s closed bandgap results in undesirably high dark currents. Here, we introduce the experimental demonstration of dense planar photodetector arrays. We demonstrate a micrometer-narrow pitched 2D detector pixels and show this approach’s repeatability by verifying performing of a 16-pixel detector array. Such dense and repeatable detector realization is enabled by a novel, selective, contamination-free 2D material transfer system, that we report here in automated operation. The so realized photodetectors responsivity peaks at a high 0.8 A/W. Furthermore, we achieve uniform detector performance via bias voltage tuning calibration to maximize deployment. Lastly, we demonstrate 2D arrayed photodetectors not only on a silicon chip platform but verify array performance on flexible polymer substrates. Densley-arrayed, flat, bendable, and uniform performing photodetector pixels enable emerging technologies in the space where lightweight and reliable performance is required, such as for the smart phone and emerging VR/AR markets, but also for smart gadgets, wearables, and also for size-weight-power-constrained aviation and space platforms.
期刊介绍:
Nanophotonics, published in collaboration with Sciencewise, is a prestigious journal that showcases recent international research results, notable advancements in the field, and innovative applications. It is regarded as one of the leading publications in the realm of nanophotonics and encompasses a range of article types including research articles, selectively invited reviews, letters, and perspectives.
The journal specifically delves into the study of photon interaction with nano-structures, such as carbon nano-tubes, nano metal particles, nano crystals, semiconductor nano dots, photonic crystals, tissue, and DNA. It offers comprehensive coverage of the most up-to-date discoveries, making it an essential resource for physicists, engineers, and material scientists.