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Graphene-contact electrically driven microdisk lasers

Active nanophotonic devices are attractive due to their low-power consumption, ultrafast modulation speed and high-density integration. Although electrical operation is required for practical implementation of these devices, it is not straightforward to introduce a proper current path into such a wa...

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Detalles Bibliográficos
Autores principales: Kim, Yoon-Ho, Kwon, Soon-Hong, Lee, Jung Min, Hwang, Min-Soo, Kang, Ju-Hyung, Park, Won Il, Park, Hong-Gyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Pub. Group 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3493654/
https://www.ncbi.nlm.nih.gov/pubmed/23047681
http://dx.doi.org/10.1038/ncomms2137
Descripción
Sumario:Active nanophotonic devices are attractive due to their low-power consumption, ultrafast modulation speed and high-density integration. Although electrical operation is required for practical implementation of these devices, it is not straightforward to introduce a proper current path into such a wavelength-scale nanostructure without affecting the optical properties. For example, to demonstrate electrically driven nanolasers, complicated fabrication techniques have been used thus far. Here we report an electrically driven microdisk laser using a transparent graphene electrode. Current is injected efficiently through the graphene sheet covering the top surface of the microdisk cavity, and, for the first time, lasing operation was achieved with a low-threshold current of ~300 μA at room temperature. In addition, we measured significant electroluminescence from a graphene-contact subwavelength-scale single nanopillar structure. This work represents a new paradigm for the practical applications of integrated photonic systems, by conformally mounting graphene on the complex surfaces of non-planar three-dimensional nanostructures.