Investigation of plasmonics resonance infrared bowtie metal antenna |
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Authors: | W Zhong Y Wang R He X Zhou |
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Institution: | (1) School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan Province, Peoples Republic of China; |
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Abstract: | An approximate resonance wavelength equation that varies with metal antenna structure size is developed to design a bowtie
gold metal antenna working at near-infrared (IR) wavelength. Bowtie antenna structures with resonance wavelength of 1.06 μm,
1.55 μm and 10.6 μm are designed based on this equation. A finite-difference time domain (FDTD) algorithm with total field
scattered field (TFSF) source simulation shows the resonance wavelength of the designed structures being precisely in agreement
with the expected wavelengths from the equation. Planar integration of the metal bowtie antennas is discussed as well. Gold
nanohole bowtie antenna arrays are fabricated and the near-field optical transmission properties of the nanohole array are
investigated with a near-field scanning optical microscope (NSOM). Our experimental results verify the near-field optical
transmission performance and further demonstrate that they are in agreement with the theoretical calculation results. The
high enhancement efficiency and integration of the metal bowtie antennas open the possibility of a wide application in IR
optoelectronics detection and imaging. |
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Keywords: | |
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