The first experimental demonstration of nonlinear terahertz difference-frequency generation in a hybrid graphene metadevice is reported. Decades of research have revealed that terahertz-wave generation is impossible in single-layer graphene. This limitation is overcome and nonlinear terahertz generation by ultra-short optical pulse injection is demonstrated. This device is an essential step toward atomically thin, nonlinear terahertz optoelectronic components.
Bibliographical noteFunding Information:
Supporting Information is available from the Wiley Online Library or from the author. C.I. and H.-D.K. contributed equally to this work. C.I. and H.C. were supported by National Research Foundation of Korea (NRF) through the Ministry of Science, ICT and Future Planning (MSIP) (Nos. NRF- 2011-0013255 and NRF-2009-0083512), the World Class Institute (WCI) Program (No. WCI 2011-001), Global Frontier Program (2014M3A6B3063709), the Yonsei University Yonsei-SNU Collaborative Research Fund of 2014, and the Yonsei University Future-leading Research Initiative of 2014. C.I. was also supported by NRF through MSIP (No. NRF-2015H1A2A1034809). H.-D.K. and B.M. were supported by Nano?Material Technology Development Program (2015036205), the WCI Program (No. WCI 2011-001), and the Pioneer Research Center Program (2014M3C1A3052537) through the NRF and the Center for Advanced Meta-Materials (CAMM-2014M3A6B3063709) funded by MSIP (No. 2012R1A2A1A03670391 and No. 2015001948).
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering