کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1660138 1517689 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of metal cluster formation on THz range spectroscopy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
The effect of metal cluster formation on THz range spectroscopy
چکیده انگلیسی
The present paper discusses terahertz (THz) spectroscopy of ion-implanted layer embedded metal particles. MgO (001) single crystals were implanted with − 75 KeV Au ions at an ion dose of 1 × 1018 cm− 2, later annealed in air at 1100 K for 1 h. After the each process, the transmittance T spectrum ranging from 250 to 2000 nm, and the reflectance R spectrum ranging from 1.2 to 21 THz were measured. The T spectra show the embedded Au particles were formed in the implanted layer. The notion of an effective dielectric function was brought to evaluate the two-phase (Au-MgO) composite material. Consequently, the R THz spectrum analysis showed the dielectric function of the implanted MgO. This dielectric function reveals that dispersion by the optical phonons. The formation of embedded Au clusters in MgO shifted the resonance frequency of the optical phonon, and increased the damping constant. Results show that the THz spectrum reflects the introduced defects and the lattice deformation caused by the ion implantation and Au cluster formation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 203, Issues 17–18, 15 June 2009, Pages 2390-2394
نویسندگان
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