title: Periodically Diameter-Modulated Semiconductor Nanowires for Enhanced Optical Absorption.
abstract: A diameter-modulated silicon nanowire array to enhance the optical absorption across broad spectral range is presented. Periodic shape engineering is achieved using conventional semiconductor processes and the unique optical properties are analyzed. The periodicity in the diameter of the silicon nanowires enables stronger and more closely spaced optical resonances, leading to broadband absorption enhancement.
authors.affiliation: Department of Emerging Materials Science, DGIST, Daegu, 711-873, South Korea.
authors.forename: Minjee
authors.initials: M
authors.lastname: Ko
authors.affiliation: Division of Nano and Energy Convergence Research, DGIST, Daegu, 711-873, South Korea.
authors.forename: Seong-Ho
authors.initials: SH
authors.lastname: Baek
authors.affiliation: Department of Emerging Materials Science, DGIST, Daegu, 711-873, South Korea.
authors.forename: Bokyung
authors.initials: B
authors.lastname: Song
authors.affiliation: DGIST-LBNL Research Center, DGIST, Daegu, 711-873, South Korea.
authors.forename: Jang-Won
authors.initials: JW
authors.lastname: Kang
authors.affiliation: Department of Emerging Materials Science, DGIST, Daegu, 711-873, South Korea.
authors.forename: Shin-Ae
authors.initials: SA
authors.lastname: Kim
authors.affiliation: Department of Emerging Materials Science, DGIST, Daegu, 711-873, South Korea.
authors.forename: Chang-Hee
authors.initials: CH
authors.lastname: Cho
keywords: diameter modulation; leaky waveguide modes; optical absorption; silicon nanowires