Bo-Kai ChaoLi-Wei NienShih-Che Lin|JIA-HAN LIChun-Hway Hsueh*2022-01-032022-01-032015978-4-86348-541-9https://www.osapublishing.org/abstract.cfm?uri=JSAP-2015-13p_2C_10https://scholars.lib.ntu.edu.tw/handle/123456789/590853https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077199154&partnerID=40&md5=61ba3f41d019c1c46dd0b230a4cb96f5Localized surface plasma is a well-known phenomenon in plasmonics. Due to the interaction with high-frequency electromagnetic fields, electromagnetic coupling could be produced in ordered metal structure array. One of the notable shape arrays is the periodic bowtie antennas, in which two noble metal triangles face tip-to-tip and are separated by a very small gap. Very strong electromagnetic field enhancement can occur between two closely spaced metal triangles, called “nanogap effect” [1]. Bowtie nanoantennas could be precisely defined by electron-beam lithography [1] However, although the electron beam width can reach several nanometers, one of the main limitations of the electron beam lithography is effective beam broadening due to the electron forward scattering in the resist. As a result, the feature resolution is not determined by the electron beam size, but by the travel of secondary electron in the electronic resist. Details of complex geometric nanostructures such as sharp tips could not be achieved in fabrication processes. To describe the imperfect tip, the effects of the corner radius on the surface plasmon resonance of periodic gold bow-tie nanostructures were explored in this study. © 2015 Japan Society of Applied Physics, Optical Society of America.Raman spectroscopy; Bow tie; Corner radius; Nanoantennae; Surface enhanced Raman spectroscopy; Nanoantennasconference paper2-s2.0-85077199154