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Fabrication of polarization-dependent reflective metamaterial by focused ion beam milling

Title
Fabrication of polarization-dependent reflective metamaterial by focused ion beam milling
Authors
Kim J.Lee Y.U.Kang B.Woo J.H.Choi E.Y.Kim E.S.Gwon M.Kim D.-W.Wu J.W.
Ewha Authors
우정원김동욱강보영
SCOPUS Author ID
우정원scopus; 김동욱scopus
Issue Date
2013
Journal Title
Nanotechnology
ISSN
0957-4484JCR Link
Citation
vol. 24, no. 1
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
By focused ion beam milling, we fabricated near-IR reflective metamaterials consisting of nano-aperture arrays. Optimum parameters of ion beam current and accelerating voltage in the fabrication process are obtained. Nano-apertures constituting reflective metamaterial are successfully milled, and possess a reflective resonance in the near-IR spectral range. With a double-split-ring resonator structure for the nano-aperture, the intensity reflection at resonance is rendered polarization dependent. It is found that the point group symmetry of the nano-aperture array determines the amount of anisotropy in the intensity reflection. Finite-difference time-domain simulation was adopted to identify details of nano-aperture metastructures transferred from nano-aperture patterns by the focused ion beam milling. © 2013 IOP Publishing Ltd.
DOI
10.1088/0957-4484/24/1/015306
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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