Arbitrary surface structuring of amorphous silicon films based on femtosecond-laser-induced crystallization

作者：Lee Geon Joon^*; Song Seok Ho; Lee YoungPak; Cheong Hyeonsik; Yoon Chong Seung; Son Yong Duck; Jang Jin

来源：Applied Physics Letters, 2006, 89(15): 151907.

DOI：10.1063/1.2358922

The arbitrary surface structuring of amorphous silicon (a-Si) films was performed by applying the Fourier-transform (FT) method to the femtosecond-laser-induced crystallization. In order to realize the arbitrary structuring, the logo q-Psi was produced in the a-Si film by the FT of a computer-generated hologram. The crystallization of a-Si was performed using the near-infrared femtosecond-laser pulses. By micro-Raman spectroscopy, scanning-electron microscopy, and transmission-electron microscopy, it was found that the femtosecond-laser pulses induced a localized phase transformation from the amorphous to the crystalline phase, and the spatially selected crystallization of the a-Si was responsible for the formation of the two-dimensional pattern.

• 出版日期2006-10-9