Resonance tuning and broadening of bowtie nanoantennas on graphene |
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| Institution: | 1. Department of Physics, Bilkent University, 06800 Ankara, Turkey;2. Nanotechnology Research Center, Bilkent University, Bilkent University, 06800 Ankara, Turkey;3. Department of Electrical and Electronics Engineering, Bilkent University, 06800 Ankara, Turkey;1. Research Center for Space Optical Engineering, School of Astronautics, Harbin Institute of Technology, Harbin 150001, China;2. Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Physics and Microelectronics Science, Hunan University, Changsha 410082, China;1. School of Physics and Microelectronic and Key Lab for Micro-Nano Physics and Technology of Hunan Province, Hunan University, ChangSha 410082, China;2. College of Science, Jiujiang University, Jiujiang 332005, China;1. College of Information Science and Engineering, Huaqiao University, No. 668, Jimei Avenue, Jimei, Xiamen 361021, China;2. Institute of Semiconductors, Chinese Academy of Science, No. 35A, Qinghua East Road, Haidian, Beijing 100086, China;1. The Electronic Imaging Center at NJIT, Newark, NJ 07102, United States;2. Department of Microbiology & Immunology, Weill Cornell Medical College, New York City, NY 10025, United States;3. Department of Biological Sciences, Rutgers University, Newark, NJ 07102, United States;1. Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, PR China;2. Hunan Provincial Collaborative Innovation Center for Environment and Energy Photocatalysis, Changsha University, Changsha 410022, PR China |
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| Abstract: | Metallic bowtie antennas are used in nanophotonics applications in order to confine the electromagnetic field into volumes much smaller than that of the incident wavelength. Electrically controllable carrier concentration of graphene opens the door to the use of plasmonic nanoantenna structures with graphene so that the resonant nature of nanoantennas can be tuned. In this study, we demonstrated with the Fourier transform infrared (FTIR) spectroscopy and the Finite Difference Time Domain (FDTD) method that the intensity and resonance peak of bowtie nanoantennas on monolayer graphene can be tuned at mid-infrared (MIR) wavelength regime by applying a gate voltage, since the optical properties of graphene change by changing the carrier concentration. |
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| Keywords: | Graphene Nanoantennas Plasmonics Bowtie antennas |
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