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Infrared and Optical Properties of Carbon Nanotube Dipole Antennas

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2 Author(s)
Jin Hao ; Dept. of Electr. Eng., Wisconsin Univ., Milwaukee, WI ; Hanson, G.W.

The characteristics of armchair carbon nanotube dipole antennas are investigated in the infrared and optical regime. The analysis is based on a classical electromagnetic Halleacuten's-type integral equation, and an axial quantum mechanical conductance function for the tube. It is found that, within a certain frequency span in the GHz-THz range, finite-length carbon nanotube dipoles resonate at approximately integer multiples of one-half of a plasma wavelength. Outside of this range, current resonances are strongly damped. In the optical regime, antenna properties are strongly modulated by interband transitions. General antenna characteristics of finite-length carbon nanotube dipoles are presented, such as input impedance, current profile, gain, and efficiency, and radiation patterns are discussed

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Nanotechnology, IEEE Transactions on  (Volume:5 ,  Issue: 6 )