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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 18, Iss. 7 — Jul. 1, 2001
  • pp: 1031–1035

Optical real-time monitoring of the laser molecular-beam epitaxial growth of perovskite oxide thin films by an oblique-incidence reflectance-difference technique

Fan Chen, Huibin Lu, Zhenghao Chen, Tong Zhao, and Guozhen Yang  »View Author Affiliations

JOSA B, Vol. 18, Issue 7, pp. 1031-1035 (2001)

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We report the results of optical in situ monitoring of the epitaxial growth of perovskite oxide thin films by an oblique-incidence reflectance-difference (OIRD) technique. Optical oscillation that corresponds to the growth cycle of an interrupted growth mode (monolayer oscillation) is observed. The monolayer oscillation shows different behaviors for layer-by-layer, Stranski–Krastanow, and three-dimensional growth modes. Optical interference oscillation is observed. The dependencies of the real and the imaginary parts of the bulk film’s refractive index on the OIRD signal are discussed and illustrated with a three-layer stack mode. Thin-film complex refractive-index and highly accurate thickness measurements can be obtained by fitting of the interference oscillation.

© 2001 Optical Society of America

OCIS Codes
(120.5700) Instrumentation, measurement, and metrology : Reflection
(120.6660) Instrumentation, measurement, and metrology : Surface measurements, roughness
(240.0310) Optics at surfaces : Thin films
(310.3840) Thin films : Materials and process characterization

Fan Chen, Huibin Lu, Zhenghao Chen, Tong Zhao, and Guozhen Yang, "Optical real-time monitoring of the laser molecular-beam epitaxial growth of perovskite oxide thin films by an oblique-incidence reflectance-difference technique," J. Opt. Soc. Am. B 18, 1031-1035 (2001)

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