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

  • Geon Joon Lee
  • , Seok Ho Song
  • , Young Pak Lee
  • , Hyeonsik Cheong
  • , Chong Seung Yoon
  • , Yong Duck Son
  • , Jin Jang

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number151907
JournalApplied Physics Letters
Volume89
Issue number15
DOIs
Publication statusPublished - 2006

Bibliographical note

Funding Information:
This work was supported by the Korea Science and Engineering Foundation (KOSEF) through Quantum Photonic Science Research Center.

Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.

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