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- W2000826145 abstract "Gallium arsenide has been implanted with nitrogen ions at 1–3 MeV and fluences between 3.3×1013 and 2.0×1017 ions/cm2. Room-temperature infrared spectra are presented which show major changes in the reststrahl region. A sample having the highest fluence was isochronally annealed with 2-h 100°C steps from 200 to 600°C, and the implantation-induced reflectivity changes are annealed by 600°C. Changes of the dispersion parameters were determined by Kramers-Kronig analysis as well as by curve fitting with classical dispersion (CD) analysis. Examples of dispersion parameters obtained by different analyses are compared and their validity is discussed. The data of nonimplanted and samples implanted with fluence up to 3.3×1014 ions/cm2 can be satisfactorily fitted with CD analysis assuming the material to be optically homogeneous. With this assumption, attempts to fit the data of samples with fluences ≥3.3 ×1015 ions/cm2 were unsuccessful. By extending the CD analysis to a layer model a reasonable fit was achieved. The analyses indicate changes in the transverse- and longitudinal-optic-mode frequencies. The latter changes were confirmed by Raman scattering measurements. Both the analyses and interference fringes observed in the near-infrared reflection spectra indicate some implantation-induced increase in the high-frequency dielectric constant." @default.
- W2000826145 created "2016-06-24" @default.
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- W2000826145 date "1974-07-01" @default.
- W2000826145 modified "2023-10-06" @default.
- W2000826145 title "Infrared reflection of ion-implanted GaAs" @default.
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- W2000826145 doi "https://doi.org/10.1063/1.1663706" @default.
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