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Journal of Nanophotonics

Tunable stoichiometry of BCxNy thin films through multitarget pulsed laser deposition monitored via in situ ellipsometry
Author(s): John G. Jones; Lirong Sun; Neil R. Murphy; Tyson C. Back; Matthew A. Lange; Jessica L. Remmert; P. Terrance Murray; Rachel Jakubiak
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Paper Abstract

Pulsed laser deposition is an energetic deposition technique in which thin films are deposited when a laser pulse at 248-nm wavelength strikes a target and material is subsequently deposited onto a substrate with ideally the same stoichiometry. By synchronizing a high-speed mirror system with the pulsing of the laser, and using two separate targets, thin films having tunable stoichiometry have been deposited. Depositions were performed in a high vacuum environment to obtain as much kinetic energy as possible during growth. Typically, some 150 pulses at 300 mJ/pulse were required to deposit 1 nm. Island growth must occur on a per pulse basis since over 100 pulses are required to deposit a 1 nm film thickness. Films were deposited to ∼100-nm thickness, and in situ ellipsometry data were modeled to calculate thickness, n and k. X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and atomic force microscopy (AFM) were all performed on each of the films. XPS demonstrated change in film composition with change in laser pulse ratio; ellipsometry displayed thickness from the model generated as well as the optical properties from 370 to 1690 nm. AFM thickness measurements were in agreement with independently modeled ellipsometry thickness values.

Paper Details

Date Published: 5 February 2014
PDF: 12 pages
J. Nanophoton. 8(1) 083999 doi: 10.1117/1.JNP.8.083999
Published in: Journal of Nanophotonics Volume 8, Issue 1
Show Author Affiliations
John G. Jones, Air Force Research Lab. (United States)
Lirong Sun, Air Force Research Lab. (United States)
Neil R. Murphy, Air Force Research Lab. (United States)
Tyson C. Back
Matthew A. Lange, Air Force Institute of Technology (United States)
Jessica L. Remmert, Universal Technology Corp. (United States)
P. Terrance Murray, Univ. of Dayton Research Institute (United States)
Rachel Jakubiak, Air Force Research Lab. (United States)

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