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Title: Optical and electrical breakdown of carbon allotropes : mechanisms and applications for data storage
Authors: Loisel, Loic
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2016
Source: Loisel, L. (2016). Optical and electrical breakdown of carbon allotropes : mechanisms and applications for data storage. Doctoral thesis, Nanyang Technological University, Singapore.
Abstract: As Moore’s law is expected to fail soon, researchers are trying to develop new ways to store data both electrically and optically. Here, we study the structural and morphological transformations occurring when carbon allotropes are subjected to large optical and electrical power densities. We show that textured carbon thin films undergo either graphitization, amorphization or matter loss when annealed by a continuous-wave laser (annealing duration several minutes). We then use 5 ns laser pulses to induce reversible phase changes (graphitization and amorphization) to similar carbon thin films, hence opening the way toward fast optically controlled carbon phase change memories. To improve the cycling ability, we provide a model explaining both the phase changes and the observed degradations. Finally, we develop planar electro-mechanical memories based on graphene, in which a nano-sized gap is created via electrical breakdown. Large resistance changes are controlled by reversible movements of two graphene flakes surrounding the gap, hence opening and closing the electrical contact.
DOI: 10.32657/10356/68465
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Theses

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