title: Self-Shadowing Deposited Pure Metal Nanohelix Arrays and SERS Application.
abstract: In this work, one-step glancing angle deposition is utilized to fabricate gold and silver nanohelix arrays (NHAs) on smooth glass substrates. During deposition, the substrate is cooled using liquid nitrogen and rotated with a tunable spin rate. The substrate spin rate is tuned to match the deposition rate to yield a spiral-like helix structure. The morphologies and optical properties of spiral-like Ag and Au NHAs are measured and compared. The polarization-dependent reflectance of Au NHA leads to a strong g-factor. The three-dimensional nanohelical structures are demonstrated to be a highly sensitive surface-enhanced Raman scattering (SERS) substrate.
authors.affiliation: Department of Electro-Optical Engineering, National Taipei University of Technology, 10608 No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei, Taiwan. jyjun@ntut.edu.tw.
authors.forename: Yi-Jun
authors.initials: YJ
authors.lastname: Jen
authors.affiliation: Department of Electro-Optical Engineering, National Taipei University of Technology, 10608 No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei, Taiwan. japan10047@yahoo.com.tw.
authors.forename: San
authors.initials: S
authors.lastname: Chan
authors.affiliation: Department of Electro-Optical Engineering, National Taipei University of Technology, 10608 No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei, Taiwan. joung80217@hotmail.com.
authors.forename: Jyong-Wei
authors.initials: JW
authors.lastname: Huang
authors.affiliation: Department of Electro-Optical Engineering, National Taipei University of Technology, 10608 No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei, Taiwan. e59302189@yahoo.com.tw.
authors.forename: Ci-Yao
authors.initials: CY
authors.lastname: Jheng
authors.affiliation: Department of Electro-Optical Engineering, National Taipei University of Technology, 10608 No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei, Taiwan. lineage107@yahoo.com.tw.
authors.forename: Wei-Chih
authors.initials: WC
authors.lastname: Liu
keywords: Glancing angle deposition; Nanohelix; SERS; g-factor