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Graphene-contact electrically driven microdisk lasers.
MedLine Citation:
PMID:  23047681     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Yoon-Ho Kim; Soon-Hong Kwon; Jung Min Lee; Min-Soo Hwang; Ju-Hyung Kang; Won Il Park; Hong-Gyu Park
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Nature communications     Volume:  3     ISSN:  2041-1723     ISO Abbreviation:  Nat Commun     Publication Date:  2012  
Date Detail:
Created Date:  2012-10-10     Completed Date:  2013-02-01     Revised Date:  2013-03-11    
Medline Journal Info:
Nlm Unique ID:  101528555     Medline TA:  Nat Commun     Country:  England    
Other Details:
Languages:  eng     Pagination:  1123     Citation Subset:  -    
Affiliation:
Department of Physics, Korea University, Seoul 136-701, Republic of Korea.
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