title: Colorizing silicon surface with regular nanohole arrays induced by femtosecond laser pulses.
abstract: We report on the formation of one- and two-dimensional (1D and 2D) nanohole arrays on the surface of a silicon wafer by scanning with a femtosecond laser with appropriate power and speed. The underlying physical mechanism is revealed by numerical simulation based on the finite-difference time-domain technique. It is found that the length and depth of the initially formed gratings (or ripples) plays a crucial role in the generation of 1D or 2D nanohole arrays. The silicon surface decorated with such nanohole arrays can exhibit vivid structural colors through efficiently diffracting white light.
authors.affiliation: Laboratory of Photonic Information Technology, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, China.
authors.forename: Cheng-Yun
authors.initials: CY
authors.lastname: Zhang
authors.forename: Jian-Wu
authors.initials: JW
authors.lastname: Yao
authors.forename: Hai-Ying
authors.initials: HY
authors.lastname: Liu
authors.forename: Qiao-Feng
authors.initials: QF
authors.lastname: Dai
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Wu
authors.forename: Sheng
authors.initials: S
authors.lastname: Lan
authors.forename: Vyacheslav A
authors.initials: VA
authors.lastname: Trofimov
authors.forename: Tatiana M
authors.initials: TM
authors.lastname: Lysak