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Single Carbon Nanotubes as Ultrasmall All-Optical Memories
ACS Photonics ( IF 7 ) Pub Date : 2017-11-17 00:00:00 , DOI: 10.1021/acsphotonics.7b01104
Takushi Uda 1, 2 , Akihiro Ishii 1, 3 , Yuichiro K. Kato 1, 3
Affiliation  

Performance improvements are expected from integration of photonic devices into information processing systems, and in particular, all-optical memories provide a key functionality. Scaling down the size of memory elements is desirable for high-density integration, and the use of nanomaterials would allow for devices that are significantly smaller than the operation wavelengths. Here we report on all-optical memory based on individual carbon nanotubes, where adsorbed molecules give rise to optical bistability. By exciting at the high-energy tail of the excitonic absorption resonance, nanotubes can be switched between the desorbed state and the adsorbed state. We demonstrate reversible and reproducible operation of the nanotube optical memory, and determine the rewriting speed by measuring the molecular adsorption and desorption times. Our results underscore the impact of molecular-scale effects on optical properties of nanomaterials, offering new design strategies for photonic devices that are a few orders of magnitude smaller than the optical diffraction limit.

中文翻译:

单碳纳米管作为超小型全光存储器

通过将光子设备集成到信息处理系统中,有望提高性能,特别是全光存储器提供了关键功能。缩小存储元件的尺寸对于高密度集成是理想的,并且纳米材料的使用将允许显着小于工作波长的器件。在这里,我们报告了基于单个碳纳米管的全光存储器,其中吸附的分子引起了光学双稳态。通过在激子吸收共振的高能尾部激发,纳米管可以在解吸状态和吸附状态之间切换。我们演示了纳米管光学存储器的可逆和可再现的操作,并通过测量分子的吸附和解吸时间来确定重写速度。
更新日期:2017-11-17
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