Femtosecond laser crystallization of amorphous Ge

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Salihoglu O., Kurum U., YAĞLIOĞLU H. G., ELMALI A., AYDINLI A.

JOURNAL OF APPLIED PHYSICS, cilt.109, sa.12, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 109 Sayı: 12
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1063/1.3601356
  • Dergi Adı: JOURNAL OF APPLIED PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Ankara Üniversitesi Adresli: Evet

Özet

Ultrafast crystallization of amorphous germanium (a-Ge) in ambient has been studied. Plasma enhanced chemical vapor deposition grown a-Ge was irradiated with single femtosecond laser pulses of various durations with a range of fluences from below melting to above ablation threshold. Extensive use of Raman scattering has been employed to determine post solidification features aided by scanning electron microscopy and atomic force microscopy measurements. Linewidth of the Ge optic phonon at 300 cm(-1) as a function of laser fluence provides a signature for the crystallization of a-Ge. Various crystallization regimes including nanostructures in the form of nanospheres have been identified. (C) 2011 American Institute of Physics. [doi:10.1063/1.3601356]